试金石
Memo to:
Memo to:
Oaktree Clients
Oaktree Clients
From:
From:
Howard Marks
Howard Marks
Re:
Re:
Touchstones
Touchstones
自金融危机爆发以来的两年多时间里,我反复强调一个主题:我们应该回顾过去,找出原因,并从中吸取教训。我在多份备忘录中,以多种方式探讨过这一课题。现在,尽管你们之前已多次听我谈及这些内容,我还是打算把这一切整合起来,借助那些最能捕捉我们经历本质的引语、格言和比喻。当我回想往事时,这些正是最突出的部分。
In the two-plus years since the onset of the financial crisis, it’s been a regular theme of mine that we should look back, identify the causes and learn from them. I’ve tackled this assignment in a number of memos and a variety of ways. Now, despite the fact that you’ve heard much of this from me before, I’m going to try to pull it all together, using the quotations, adages and images that I feel best capture the essence of what we’ve been through. When I think back, these are the ones that stand out.
“贪婪即美德”
《华尔街》这部电影里哪句台词最令人难忘,没什么好争的。很难忘记那个油头粉面的收购大亨戈登·盖柯,鼓动他的手下,大谈利己之心的积极力量。他所说的“贪婪即美德”,当然是指贪婪——或者说自利,或者说逐利动机——正是推动自由市场环境中的人和企业不断追求更多、更好,从而勤奋工作、优化配置资源的动力。这股力量驱使着亚当·斯密所说的“看不见的手”,推动经济走向更高的产出和更高的生活水平。
在我们偶尔目睹的诸多钟摆式现象中,有一个就是人们对自由市场的信赖程度的摇摆。起初他们信任市场能拿出解决方案。然后这些方案的缺陷暴露无遗,于是呼吁监管。接着政府介入的愚蠢之处变得显而易见,人们又想要自由市场回来,如此循环往复。因为两个极端都不完美,在两者之间的摆动就不会停止。政府运转不了经济,也经营不了企业。但同样千真万确的是,在自由市场中,规则偶尔会被突破,参与者会受到伤害。
在自由市场中,事情必然会越过最优状态走向极端。当它们摆荡回来时,退潮可能很痛苦。因此,如果我们打算依靠市场来定夺一切,就必须愿意承担后果。
危机前的那些年,自由市场备受尊崇、言听计从,监管被视为不过是市场运行中的一个潜在障碍。(我在那堆剪报里找不到的一篇文章,对政府行动的缺失做了精妙的解释:“这就是一个不相信监管的政府所提供的监管。”)这种态度让金融机构得以采取行动、承担风险,结果证明是愚蠢、无利可图且不可持续的。它们的策略在 2008 年把它们带到了灾难的边缘。
在一个真正自由的市场里,贝尔斯登、美林、花旗、AIG、房利美、房地美和其他公司很可能早已破产。那些破产本会很有教育意义,
“Greed Is Good” There’s no debating which line from the film Wall Street is the most memorable. It’s hard to forget the image of slicked-back takeover artist Gordon Gekko urging on his troops, invoking the positive power of self-interest. What he meant by “greed is good,” of course, was that greed – or self-interest, or the profit motive – is what drives people and companies operating in a freemarket setting to strive for more and better, and thus to work hard and optimally allocate resources. It’s the force that motivates Adam Smith’s “invisible hand” and carries economies to increased output and higher standards of living. Among the many pendulum-like phenomena we occasionally witness is the swing in people’s willingness to rely on the free market. First they trust the market to come up with solutions. Then the shortcomings of those solutions are laid bare and there’s a call for regulation. Then the folly of government involvement becomes evident and people want the free market back, and so forth. Because neither extreme is perfect, the oscillation between them goes on. Governments can’t run economies or companies. But it’s equally true that in a free market, the rules will occasionally be stretched and participants harmed. In a free market, things will inevitably go past the optimal to the extreme. When they swing back, the retreat can be painful. Thus, if we’re going to rely on the market to settle things, we have to be willing to accept the consequences. In the pre-crisis years, the free market was revered and deferred to, and regulation was thought of as little more than a potential impediment to the market’s processes. (An article I can’t locate in my pile of clippings beautifully explained the dearth of government action: “That’s the kind of regulation you get from an administration that doesn’t believe in regulation.”) That attitude permitted financial institutions to take actions and bear risks that turned out to be unwise, unprofitable and unsustainable. Their strategies took them to the brink of disaster in 2008. In a truly free market, Bear Stearns, Merrill Lynch, Citibank, AIG, Fannie Mae, Freddie Mac and others likely would have gone bankrupt. Those bankruptcies would have been quite instructive,
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但同样痛苦不堪。如果这世界不愿时不时地领受这样的教训——如果某些机构被认为“大到不能倒”,为了社会的利益——那么自由市场和利己主义就必须受到约束。贪婪或许有益,但放任自流也只能到一定程度为止。
but also quite painful. If the world is unwilling to live with such lessons from time to time – and if some institutions are considered to be “too big to fail” for society’s purposes – then free markets and self-interest have to be restrained. Greed may be good, but it can be permitted to run free only up to a point.
世上没有比“普遍认为没有风险”更大的风险
最近这场危机之所以爆发,主要是因为投资者参与了一些新奇、复杂且危险的东西,而且参与规模空前。他们加了过多的杠杆,把过多的资本投进了流动性差的资产。他们为什么这么做?这一切之所以发生,是因为投资者信得太多、担心得太少,于是承担了过多的风险。简而言之,他们以为自己活在一个低风险的世界里。
比如在 2006 年和 2007 年初,我们听到很多关于“流动性之墙”的说法,说这堵墙正从中国和产油国朝我们涌来,这股资金流可以指望源源不断地提供资本、不断推高资产价格。同样,我们还被告知:(一)美联储靠巧妙的管理已经驯服了商业周期;(二)证券化、分层切块和去中介化把风险放到了最能妥善处置的地方,从而降低了风险;(三)“格林斯潘看跌期权”随时可以指望,用来拯救犯了错误的投资者。诸如此类的说法,被认为已经把全世界的风险水平降了下来。
相信风险已被驱除,这是让人们放手去做那些他们原本会觉得有风险的事情、并允许资产被哄抬到在一个被认为有风险的世界里显然过高的价格的关键因素。
……前美联储主席保罗·沃尔克指出,金融危机的成因之一,“是薪酬制度提供的巨大冒险激励与金融创新相结合,最终产生爆炸性效果”——恰逢新的金融创新“似乎提供了保证——后来证明是虚假的保证——说这些风险已经被分散掉了。”(《华尔街日报》,2009 年 9 月 18 日)
担忧及其近亲——不信任、怀疑和风险厌恶——是金融体系安全的必备要素。套用一句关于破产有用性的老话:对亏损的恐惧之于资本主义,正如对地狱的恐惧之于天主教。担忧让高风险贷款不被发放,让公司不会背上超出自身偿还能力的债务,让投资组合不会过度集中,让未经证实的 scheme 不会演变成大众狂热。当担忧和风险厌恶恰如其分地存在时,投资者会质疑、会调查、会谨慎行事。高风险投资要么不做,要么就必须在预期收益上提供足够的补偿。
但只有当投资者足够厌恶风险时,市场才会提供充分的风险溢价。当担忧稀缺时,高风险借款人和可疑的计划就能轻易拿到资本,金融体系就会变得岌岌可危。过多的钱会追逐高风险和新奇的东西,推高资产价格,压低预期回报和安全性。
Nothing’s More Risky Than a Widespread Belief That There’s No Risk The recent crisis came about primarily because investors partook of novel, complex and dangerous things, in greater amounts than ever before. They took on too much leverage and committed too much capital to illiquid investments. Why did they do these things? It all happened because investors believed too much, worried too little, and thus took too much risk. In short, they believed they were living in a low-risk world. In 2006 and early 2007, for instance, we heard a lot about the “wall of liquidity” that was coming toward us from China and the oil producing countries, a flow that could be counted on to provide capital and raise asset prices non-stop. Likewise, we were told (a) the Fed had tamed the business cycle through its adroit management, (b) securitization, tranching and disintermediation had reduced risk by putting it where it could best be handled, and (c) the “Greenspan put” could always be counted on to bail out investors who made mistakes. These and other things were said to have lowered the risk level worldwide. Belief that risk has been banished is a key element in allowing people to engage in practices they would otherwise view as risky, and in permitting assets to be bid up to prices that would clearly be too high in a world perceived to involve risk. . . . former Fed Chairman Paul A. Volcker noted that one of the causes of the financial crisis “was the ultimately explosive combination of compensation practices that provided enormous incentives to take risks” just as new financial innovations “seemed to offer assurance – falsely, as it turned out – that those risks had been diffused.” (The Wall Street Journal, September 18, 2009) Worry and its relatives, distrust, skepticism and risk aversion, are essential ingredients in a safe financial system. To paraphrase a saying about the usefulness of bankruptcy, fear of loss is to capitalism as fear of hell is to Catholicism. Worry keeps risky loans from being made, companies from taking on more debt than they can service, portfolios from becoming overly concentrated, and unproven schemes from turning into popular manias. When worry and risk aversion are present as they should be, investors will question, investigate and act prudently. Risky investments either won’t be undertaken or will be required to provide adequate compensation in terms of anticipated return. But only when investors are sufficiently risk averse will markets offer adequate risk premiums. When worry is in short supply, risky borrowers and questionable schemes will have easy access to capital, and the financial system will become precarious. Too much money will chase the risky and the new, driving up asset prices and driving down prospective returns and safety.
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市场要正常运转,在这个市场上投资和放贷的人必须相信,他们的钱确实是冒着风险的。(奥巴马总统,2009 年 9 月 14 日)显然,在危机前的数月乃至数年里,几乎没有参与者像应该的那样忧心忡忡。
For a market to function, those who invest and lend in that market must believe that their money is actually at risk. (President Obama, September 14, 2009) Clearly, in the months and years leading up to the crisis, few participants worried as much as they’re supposed to.
索罗斯的反身性理论
一些最大的问题之所以出现,是因为市场参与者把自己的环境看作一个静态的舞台,自己只是在这个舞台上行动。他们忽略了一点——这一点常常让他们吃大亏——那就是自己的行动会改变环境,导致结果与预期相悖。
乔治·索罗斯在谈到投资者行为能够改变环境这一点上,写得最透彻,讲得也最清楚。他把这个过程称为“反身性”。
公认的理论是,金融市场趋于均衡,总体上能正确地为未来折现。我的操作依据的是另一套理论,按照这套理论,金融市场不可能正确地为未来折现,因为它们不只是折现未来,它们还在塑造未来。在某些情况下,金融市场能够影响所谓的“基本面”——而这些基本面本来是它们应当反映的对象。一旦出现这种情况,市场就进入动态失衡状态,其表现会与有效市场理论所认定的“正常”大相径庭。这种繁荣/崩溃的序列并不常出现,但一旦出现,就可能极具破坏力,恰恰因为它会影响到经济的基本面……(乔治·索罗斯,麻省理工学院经济系世界经济实验室会议,华盛顿特区,1994 年 4 月 26 日)
我儿子安德鲁,现在刚开始他的投资生涯,给了一个关于反身性在现实中如何运作的例证,清晰又切中时弊。在危机爆发前的几年里,对低风险高回报的追求(这也不是什么新事)催生了对抵押贷款类投资产品的强劲需求,比如 RMBS 和 CDO。这一切的基础是这样一个事实:全美房价从未出现过全国性下跌,因此参与者都相信,地域分散化足以让加了杠杆的抵押贷款池变得安全,足以让由此产生的大部分证券获得 AAA 评级。对这些产品日益增长的需求,要求底层抵押贷款的数量不断增加。这一需求导致放贷标准被放松,信用状况存疑的购房者也被发放了贷款。宽松的融资让购房者能把房价推到高于房屋实际价值的位置,也让借款人偿还房贷变得艰难。当房价上涨这台永动机在 2007 年戛然而止时,高企的房价和创纪录的房贷违约叠加在一起,造成了美国史上第一次全国性房价下跌。所以,到头来,正是“某项资产很安全”这一信念,引发了投资者的行为,最终让这项资产变得不安全。这就是反身性。
在 2003 年到 2007 年,如上所述,投资者把世界看作一个低风险的地方。于是他们争相买入自己看好的资产,自有资金用完了就借钱加码买入。他们指望用廉价的杠杆买来的东西能带来高
Soros’s Theory of Reflexivity Some of the biggest problems arise because market participants think of their environment as a static arena in which they act. What they miss – to their frequent detriment – is that their actions alter the environment, causing the results to differ from their expectations. George Soros has written and spoken most articulately about the ability of investors’ actions to change the environment. He calls this process “reflexivity.” The generally accepted theory is that financial markets tend towards equilibrium, and on the whole, discount the future correctly. I operate using a different theory, according to which financial markets cannot possibly discount the future correctly because they do not merely discount the future; they help to shape it. In certain circumstances, financial markets can affect the so-called fundamentals which they are supposed to reflect. When that happens, markets enter into a state of dynamic disequilibrium and behave quite differently from what would be considered normal by the theory of efficient markets. Such boom/bust sequences do not arise very often, but when they do, they can be very disruptive, exactly because they affect the fundamentals of the economy. . . . (George Soros, MIT Department of Economics World Economy Laboratory Conference, Washington, D.C., April 26, 1994) My son Andrew, now starting his investment career, has provided an illustration of reflexivity at work that’s clear and topical. For several years prior to the crisis, the desire for high returns with low risk (what else is new?) created strong demand for mortgage-based investment products such as RMBS and CDOs. Underpinning it all was the fact that there had never been a nationwide decline in home prices, and thus participants were confident that geographic diversification would render levered mortgage pools safe, warranting triple-A ratings for most of the resulting securities. Rising demand for these products required an increasing volume of underlying mortgages. This need caused lending standards to be weakened and loans to be provided to home buyers with dubious creditworthiness. Easy financing allowed buyers to bid up home prices to levels that exceeded the homes’ realistic values and made it tough for borrowers to make their mortgage payments. When the perpetual-motion machine of house appreciation ground to a halt in 2007, the combination of too-high prices and record mortgage defaults resulted in the first nationwide decline in home prices. Thus, in the end, the belief that an asset was safe led to investor behavior that made it unsafe. That’s reflexivity. In 2003-07, as described above, investors considered the world a low-risk place. Thus they rushed to buy assets they found attractive, borrowing in order to buy more when their own capital was exhausted. They expected purchases made with cheap leverage to produce high
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低风险就能赚到的利润。但他们的买入推高了资产成本,也加剧了环境的风险性,把原本的“低风险”策略变成了高风险策略。后果已经显而易见。
profits with low risk. But their buying drove up both the cost of the assets and the riskiness of the environment, transforming their “low-risk” strategies into high-risk ones. The consequences have become clear.
格林斯潘与泡沫
投资者改变环境最显著的方式之一,就是制造资产泡沫,比如 2007 年夏天破灭的那一个。他们会得出某个投资必定稳赚的结论——事后看这过程总是显得荒唐——依据的往往是些经不起推敲的简单口号。这些口号包括:“互联网股票必然上涨,因为这些公司要改变世界”“房地产(或黄金)是对冲通胀的好工具”“全国房价永远不会下跌”“油价必然走高,因为消耗速度超过发现速度”“另类投资(或对冲基金、私募股权基金)是实现投资目标的关键”。因为这些口号被赋予了强大的说服力,投资者进而认定,无论以什么价格买入,这些投资都会赚钱。这怎么可能对?任何东西都不可能无论什么价格买都是好投资。但当一条看似合理的口号被蜂拥的人群接受时,这种信念就成了结果。泡沫就是这么来的。
泡沫思维是非理性的,因为它建立在“没有太高的价格”这一信念之上。这种思维会以各种方式显现。上世纪 70 年代,恶性通胀横行、利率高得吓人,人们得出结论:不管利率多高,借钱买房地产这类“抗通胀”资产都能赚钱。这就是泡沫思维。
在我四十年的职业生涯里,我见过成长股泡沫、小盘股泡沫、石油股泡沫、新兴市场股票泡沫和科技股泡沫,还有白银、房产和杠杆收购这类“稳赚不赔”的东西。每一次,标的资产的吸引力背后都有合乎逻辑的理由,但人们忽略了一点:泡沫思维可能已经把价格推到了危险的水平。
艾伦·格林斯潘在 1987 年至 2006 年任美联储主席期间,对经济和市场走势影响巨大,而他在泡沫问题上的记录相当糟糕。1996 年,道琼斯指数突破 6000 点,他高调抨击“非理性繁荣”,语惊四座。但此后他就沉默了,反而用生产率提高为由,为指数一路涨过 10000 点寻找合理性。以下是他对泡沫的立场:
……泡沫一般只有事后才能察觉。要提前识别泡沫,需要有判断力断定几十万知情投资者全都错了。泡沫破灭固然不是什么好事,但其后果未必对经济构成灾难。(1999 年 6 月 17 日)
……即便及早识别出泡沫,能否在不引发央行大幅收缩经济的情况下将其化解,也远非显而易见。
Greenspan and Bubbles One of the most obvious ways in which investors change the environment is through the creation of asset bubbles, like the one that popped in the summer of 2007. In a process that invariably looks silly after the fact, they reach the conclusion that an investment is a sure winner, usually on the basis of simplistic platitudes that simply can’t hold up under scrutiny. These include “Internet stocks must rise because these companies are going to change the world,” “real estate (or gold) is a good hedge against inflation,” “home prices can never decline nationwide,” “oil will appreciate because it’s being consumed faster than it’s being found,” and “alternative investments (or hedge funds or private equity funds) hold the key to meeting investment goals.” Because of the strength attributed to these platitudes, investors go on to conclude that the investments they support will be profitable regardless of the price at which they’re undertaken. How can this be right? It’s not possible that something can be a good investment regardless of the price paid. But when a logical-seeming platitude is adopted by the stampeding herd, that belief is the result. That’s how we get bubbles. Bubble thinking is irrational, given that it’s built on a belief that there’s no price too high. This goes on to manifest itself in a variety of ways. In the 1970s, when hyper-inflation was rampant and interest rates were astronomical, people concluded that no matter the interest rate paid, borrowing to buy “inflation protected” assets like real estate would be profitable. That’s bubble thinking. In my forty-year career, I’ve seen bubbles in growth stocks, small stocks, oil stocks, emerging market stocks and tech stocks, as well as such surefire winners as silver, homes and buyouts. In each instance, there was a logical underlying rationale for the desirability of the subject assets, but people overlooked the possibility that bubble thinking had raised prices to dangerous levels. Alan Greenspan greatly influenced economic and market developments during his term as Fed Chairman from 1987 to 2006, and his record on the subject of bubbles was poor. He set the world on its ear in 1996 by railing against “irrational exuberance” as the Dow Jones Index soared past the 6,000 level, but he was quiet thereafter, rationalizing appreciation well beyond 10,000 based on gains in productivity. Here’s his position on bubbles: . . . bubbles generally are perceptible only after the fact. To spot a bubble in advance requires a judgment that hundreds of thousands of informed investors have it all wrong. While bubbles that burst are scarcely benign, the consequences need not be catastrophic for the economy. (June 17, 1999) . . . it was far from obvious that bubbles, even if identified early, could be preempted short of the central bank inducing a substantial contraction in economic
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活动——恰恰是我们想要避免的结果。长期的扩张催生出更大的理性冒险意愿,这种模式很难通过温和收紧货币政策来扭转……我们意识到,尽管心存怀疑,但要确切识别泡沫,几乎只能事后诸葛亮。……认为通过提前刺破泡沫就能缓和其破灭的想法,几乎肯定是一种幻觉。(2002 年 8 月 30 日)
因此,他的观点是:(a)泡沫只能事后识别,而非在其形成过程中察觉;(b)即便察觉,泡沫也难以温和消除;(c)与其消除泡沫,不如加以管理;(d)消除泡沫并非美联储的职责。这种对泡沫的宽松立场,很容易被视为助长了泡沫的膨胀。例如:
……全国住宅建筑商协会的首席经济学家表示,上周在国会作证时,所谓房地产市场的“泡沫”一说已被彻底驳斥。……全国住宅建筑商协会首席经济学家戴维·赛德斯说:“该是让这个问题尘埃落定的时候了。全国的住宅建筑商说过,房地产经纪人也说过,现在艾伦·格林斯潘再次明确表态:当前或即将出现的房价泡沫根本不存在。”
在被问及此事时,格林斯潘在作证中说:“我们研究过泡沫问题,结论是极不可能出现。”他将近期房价的“可观上涨”归因于“低抵押贷款利率、移民以及可建土地的稀缺对需求的影响”。(美国商业资讯,2002 年 7 月 22 日,强调为后加)
忽视泡沫,是忽视整体风险的一个特例。哲学家乔治·桑塔亚那有句名言:“忘记过去的人,注定要重蹈覆辙。”同样,那些未能从过往泡沫中汲取教训的人,必然会在新泡沫破灭时蒙受损失。
activity – the very outcome we would be seeking to avoid. Prolonged periods of expansion promote a greater rational willingness to take risks, a pattern very difficult to avert by a modest tightening of monetary policy . . . we recognized that, despite our suspicions, it was very difficult to definitively identify a bubble until after the fact. . . . the idea that the collapse of a bubble can be softened by pricking it in advance is almost surely an illusion. (August 30, 2002) Thus it was his view that (a) bubbles can only be detected in retrospect, not as they occur, (b) even if detected, bubbles are hard to deflate benignly, (c) rather than deflate them, bubbles can be managed, and (d) deflating bubbles isn’t the job of the Fed. This relaxed position on bubbles can easily be seen as having abetted their growth. For example: . . . testimony before Congress last week refutes, once and for all, the existence of an alleged housing market “bubble,” said chief economists of the National Association of Home Builders. . . . “The time has come to put this issue to rest,” said NAHB Chief Economist David Seiders. “The nation’s home builders have said it, the Realtors have said it, and now Alan Greenspan has said it once again, in no uncertain terms: there is no such thing as a current or impending house price bubble.” Asked about the issue during his testimony, Greenspan said, “We’ve looked at the bubble question and we’ve concluded that it is most unlikely.” He attributed recent “sizeable gains” in home prices to “the effects on demand of low mortgage rates, immigration and shortages of buildable land.” (Business Wire, July 22, 2002, emphasis added) Ignoring bubbles is a special case of ignoring risk in general. The philosopher George Santayana is famous for having said, “Those who cannot remember the past are condemned to repeat it.” Likewise, those who fail to learn from past bubbles are bound to suffer in the bursting of new ones.
你押得越多,赢的时候赢得越多
在危机爆发前的几年里,对风险的漠视助长了大量冒险行为,其中最大的一个就是对杠杆的滥用,拿借来的钱放大收益,这种做法遍地开花。
人们做投资,靠的是预期回报为正。当借钱的成本低于预期回报时,用杠杆看上去铁定能放大收益。于是这一节开头那句拉斯维加斯箴言就派上了用场,正是这种念头,给了杠杆勾魂摄魄的诱惑力。
但杠杆远不止这么简单,可惜其余的部分只有等事情搞砸了才学得会。杠杆不会让一笔投资变得更好,它只是把赚和亏都放大了。杠杆就是詹姆斯·格兰特在《格兰特利率观察家》里说的“脑子里的钱”,意思是只要出借人能把钱收回去,这笔钱就可能凭空消失。而任何组合
The More You Bet, the More You Win When You Win In the years just prior to the crash, obliviousness to risk encouraged numerous forms of risky behavior. One of the greatest was the use of leverage to increase returns, a phenomenon that became widespread. People make investments on the basis of positive expected returns. When the cost of borrowing is below the expected return, using leverage appears certain to magnify the gain. Thus the Las Vegas maxim that heads this section comes into play, and it's that kind of thinking that gives leverage its seductive power. But there’s so much more to leverage than that, and unfortunately the rest is learned only when things go badly. Leverage doesn’t make an investment better; it merely magnifies the gains and losses. Leverage is what James Grant of Grant’s Interest Rate Observer calls “money of the mind,” meaning it can vanish if the lender is able to take his money back. And any combination
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根本性的困境在于,资产价格下跌、市场流动性减弱、抵押物价值测试和追加保证金要求,都可能让使用杠杆的投资者一败涂地。2008 年第四季度,许多人正是遭遇了这样的命运。
2003 年至 2007 年间,美联储压低利率、无忧无虑的投资者对风险溢价的要求不高,加上金融机构争相放贷,共同让低成本杠杆变得唾手可得。这种廉价融资(a)让人们相信,高杠杆是从低收益基础投资中获取更高回报的途径,(b)为各方争夺资产的竞价战提供了弹药,(c)促使人们在融资之河干涸前争相借贷买入。结果是一场规模空前的抢购狂潮,其代价——以债务到期日来看,往往无力偿还——将在未来几年内集中显现。
与投资中的其他几乎所有事物一样,杠杆本身无所谓好坏。在恰当的时机、以审慎的金额、用于购买价格偏低的资产,它是好东西。但危机前的几年并非如此。这也是我们此后陷入困境的一大原因。
of fundamental difficulty, falling asset prices, reduced market liquidity, collateral value tests and margin calls can be the ruination of investors employing leverage. That’s what befell many in the fourth quarter of 2008. In 2003-07, interest rates brought low by the Fed, modest demands for risk premiums on the part of unworried investors, and financial institutions’ competition to lend conspired to make lowcost leverage readily available. That cheap financing (a) convinced people that high leverage was the route to increased returns (even from low-yielding underlying investments), (b) armed all parties for a bidding war for assets, and (c) made people rush to borrow and buy before the river of financing ran dry. The result was a buying spree of massive proportions, the bill for which – in terms of debt maturities, often unpayable – will come due in the next few years. Like just about everything else in investing, leverage is neither good nor bad per se. Used at the right time, in judicious amounts, to purchase low-priced assets, it’s a good thing. But that’s not the story of the pre-crisis years. And that’s a big reason for the trouble we’ve had since.
“风险意味着可能发生的事情多于将要发生的事情”
伦敦商学院埃尔罗伊·迪姆森的这句话有助于把风险讲清楚。风险一直被过度复杂化、过度精致化,但迪姆森这个简单的表述让人一下子明白风险到底是怎么回事。
投资从头到尾就是在跟未来打交道。要这么做,人们必须对前路形成判断。但几乎没有什么比预测更有潜在危害。我在这方面收集了大量引语。这里挑两句我最喜欢的,实际上我还有成千上万句:
预测者分两类:一类不知道,另一类不知道自己不知道。
——约翰·肯尼斯·加尔布雷思
想到自己可能有所不知,这令人恐惧;但更令人恐惧的是,大体说来,这个世界是由那些深信自己完全知道正在发生什么的人掌管的。
——阿莫斯·特沃斯基
2003 至 2007 年间犯下的错误之一,就是过于相信预测未来的能力,这个错误成了危机的基石。投资者、风险管理者、金融机构高管、评级机构和监管机构都信任预测、外推和计算机模型。这让他们对风险感到安心,而这种安心从来都是危险的安排。
“我懂”式投资流派在我的备忘录里被屡屡提及(比如 2004 年 5 月 7 日的《我们与他们》)。这个流派的成员——基金经理、华尔街策略师和媒体——
“Risk Means More Things Can Happen Than Will Happen” The above quote from Elroy Dimson of the London Business School helps bring risk into focus. Risk has been the subject of excessive complication and sophistication, but Dimson’s simple formulation makes clear what it’s all about. Investing consists entirely of dealing with the future. To do that, people must form opinions about what lies ahead. But few things are more potentially harmful than projections. I’ve collected a lot of quotations on this subject. Here are my two favorites, but I have a million more: We have two classes of forecasters: Those who don’t know – and those who don’t know they don’t know. John Kenneth Galbraith It’s frightening to think that you might not know something, but more frightening to think that, by and large, the world is run by people who have faith that they know exactly what’s going on. Amos Tversky One of the errors committed in 2003-07 – forming a cornerstone of the crisis – consisted of believing too much in the ability to predict the future. Investors, risk managers, financial institution executives, rating agencies and regulators trusted forecasts, extrapolations and computer models. This made them comfortable with risk, always a dangerous arrangement. The “I know” school of investing has received frequent mention in my memos (e.g., “Us and Them,” May 7, 2004). Its members – money managers, Wall Street strategists and media
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那些专家——相信未来只有一种可能,而且提前就能知道,他们还自认是知道答案的那批人。他们急着告诉你未来会怎样,同样也乐意对自己过去预测的失误视而不见。他们反复忽略的事实是:(a)未来的可能性范围很广;(b)其中一些——“黑天鹅”——就算提前也无法想象;(c)即便有可能知道哪种结果最可能发生,其他结果合计起来的概率也相当可观,同样可能取而代之。
因此,每位投资者都要回答的一个关键问题是:他把未来看作可知的还是不可知的。觉得自己知道未来走向的投资者,行动会很果断:押注方向、集中持仓、加杠杆、指望未来增长——换句话说,做的都是些在缺乏预知能力的情况下会增加风险的事。另一方,觉得自己不知道未来走向的人,做法就截然不同:分散投资、对冲、少用杠杆(或根本不用)、更看重今天的价值而非明天的增长、停留在资本结构的高处、总的来说为各种可能的结果做好准备。
第一类投资者在危机爆发前的几年里表现好得多。但第二类人在危机展开时准备更充分,他们有更多可用资金(心态也更完整),得以在最低点买入获利。
pundits – believe that there’s a single future, it is knowable in advance, and they’re among the people who know it. They’re eager to tell you what the future holds, and equally willing to overlook the inaccuracy of their past predictions. What they repeatedly ignore is the fact that (a) the future possibilities cover a broad range, (b) some of them – the “black swans” – can’t even be imagined in advance, and (c) even if it’s possible to know which one outcome is the most likely, the others have a substantial combined probability of occurring instead. Thus one key question each investor has to answer is whether he views the future as knowable or unknowable. An investor who feels he knows what the future holds will act assertively: making directional bets, concentrating positions, levering holdings and counting on future growth – in other words, doing things that in the absence of foreknowledge would increase risk. On the other hand, someone who feels he doesn’t know what the future holds will act quite differently: diversifying, hedging, levering less (or not at all), emphasizing value today over growth tomorrow, staying high in the capital structure, and generally girding for a variety of possible outcomes. The first group of investors did much better in the years leading up to the crash. But the second group was better prepared when the crash unfolded, and they had more capital available (and more-intact psyches) with which to profit from purchases made at its nadir.
永远别忘了那个六英尺高的汉子,淹死在平均水深五英尺的小溪里。未来的可能性范围——我们必须面对的各种环境——总会有一些糟糕的情况冒出来。我们得为此做好准备,而做准备的前提条件,就是先意识到它们的存在。顺着上一节往下说,关键在于把未来看作一个可能性的区间,而不是一个可靠的单一预测值。
成功的投资者怎么为不确定的未来做准备?靠的是沃伦·巴菲特所说的“容错空间”或“安全边际”。正是有了这个缓冲,哪怕事情不顺着我们的意思走,我们也能从容应对。
如果投资者只盯着某一个未来,并一门心思想着在自己判断正确的前提下做到利益最大化,那一旦判断出错,麻烦就大了。相反,那些放弃最大化姿态的投资者,在意外负面冲击来临时,往往能表现得更好。因此,有几件事必须想明白:
Never Forget the 6'-Tall Man Who Drowned Crossing the Stream That Was 5' Deep on Average The range of possibilities – the environments with which we must deal – invariably will include some bad ones. We must prepare for them, and the unavoidable prerequisite for doing so is being aware of them. Following from the section above, the key is to view the future as a range of possibilities, not a reliable point estimate. How does the successful investor prepare for the uncertain future? By building in what Warren Buffett calls “margin for error” or “margin of safety.” It’s having this margin that enables us to do okay even when things don’t go our way. If an investor prepares for a single future and attempts to maximize under the assumption that his view will prove right, he’ll be in big trouble if it doesn’t. The investor who backs off from the maximizing position is likely to do better when negative surprises occur. Thus it’s essential to realize a few things:
仅仅考虑“平均而言”的生存是不够的——投资上的生存必须要在每一天、各种环境下都做到。
在不利条件下幸存的能力,来自投资组合的容错空间。
确保足够的容错空间,与追求收益最大化,两者不可兼得。
It’s not sufficient to think about surviving “on average” – investment survival has to be achieved every day, under all circumstances. The ability to survive under adverse conditions comes from a portfolio’s margin for error. Ensuring sufficient margin for error and attempting to maximize returns are incompatible.
杠杆的运用是上述道理的一个特例。杠杆放大成功时的收益,也放大失败时的损失。因此,杠杆提高了顺境下收益最大化的概率,却也压缩了逆境中的安全边际。2008 年,那些最终被证明本息无虞的杠杆贷款,却因心理因素和市场情绪而价格大跌,
The use of leverage illustrates a special case of the above. Leverage increases the gains if you succeed and the losses if you fail. Thus leverage increases the probability of maximizing under favorable outcomes and reduces your margin of safety under unfavorable ones. In 2008, leveraged loans that ultimately proved to be money-good declined in price for psychological and
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技术原因。能够坚持持有的贷款投资者最终都回本了,但许多加杠杆买入的人等不到那一天,在水深之处淹死了。
technical reasons. Loan investors who were able to hold on recovered, but many who had bought with leverage couldn’t do so. They drowned in the deep part of the stream.
查克·普林斯说跳舞
花旗集团前首席执行官的一段话只有 30 个词,但它足以成为研究崩盘前种种事态的一个案例:
音乐停止时,流动性方面的事情会变得复杂。但只要音乐还在响,你就得起身跳舞。我们仍在跳舞。
(查尔斯·普林斯,2007 年 7 月 9 日)
我在 2007 年年中就怀疑,这段话最终会成为这一轮周期的标志性注脚。它被反复引用,但通常省略了开头那十几个词。普林斯对局势的洞察,似乎比人们愿意承认的要更清醒。他可能已经感觉到,银行在放贷和加杠杆上如履薄冰,和别的银行没什么两样。问题不在于他忽视了危险,而在于他觉得无论如何也得参与进去。
企业面临的两难之一,是它们会得出结论:自己别无选择,只能卷入危险的行为。通常这是因为它们不愿放弃市场份额。10 月 5 日,特拉华州衡平法院副大法官利奥·斯特林在《纽约时报》Dealbook 专栏中写道:
……任何一家特定公司抵制模仿竞争对手那种过度冒险但合规行为的能力,都会受到削弱——只要管理层因跟不上所谓行业领袖的步伐而面临批评甚至被撤职,而这些行业领袖的高短期回报取悦了一个满是寻找阿尔法的短线投资者的股市。
在“竞相逐底”一文(2007 年 2 月 14 日)中,我描述了资本提供者在竞争升温时会从事的危险行为。其公式再简单不过:当太多钱追逐太少的交易时,资产价格被推高,预期回报被压低,风险随之上升。
那七个字——太多钱追逐太少的交易——对“以安全方式赚取良好回报”的可能性而言,是绝对的丧钟。人们本应能像普林斯那样判断出这种局面已经出现,但仍然倾向于随大流。这往往是因为,即便他们认出了危险,也知道“过于领先于时代与犯错难以区分”,他们不想脱节。
在我看来,投资者面临两大风险:亏钱的风险和错过的风险。虽然投资者应当在这两者之间取得平衡,但现实中这又是那条钟摆经常在极端之间来回摆动的弧线之一。
市场的性情——钟摆的位置——可以从参与者面对这两种风险时的行为中推断出来。就在崩盘前的几年里,在……的鼓励下
Chuck Prince on Dancing A quotation from the former CEO of Citigroup contains just 30 words, but it could serve as a case study regarding the events leading up to the crash: When the music stops, in terms of liquidity, things will be complicated. But as long as the music is playing, you’ve got to get up and dance. We’re still dancing. (Charles Prince, July 9, 2007) I suspected in mid-2007 that this quotation would end up being emblematic of the cycle. It’s been replayed many times, but usually without the first dozen words. Prince seems to have been more aware of what was going on than people give him credit for. He may have sensed the bank was on thin ice in lending and levering, like the rest. The problem wasn’t that he overlooked the danger; the problem was that he felt he had to participate anyway. One of the dilemmas faced by businesses is that they can conclude that they have no choice but to take part in dangerous behavior. Usually this is because they’re unwilling to cede market share. On October 5, Leo Strine, Vice Chancellor of the Delaware Court of Chancery, wrote as follows in The New York Times Dealbook: . . . the ability of any particular firm to resist imitating the overly risky, but lawcompliant behavior of competitors will be compromised to the extent that managers face criticism or even removal for not keeping up with so-called industry leaders whose high, short-term returns have pleased a stock market filled with short-term investors looking for alpha. In “The Race to the Bottom” (February 14, 2007), I described the dangerous behavior that providers of capital engage in when the competition becomes heated. The formula is one of the simplest: when there’s too much money chasing too few deals, asset prices are driven up, prospective returns are driven down, and risk rises. Those seven little words – too much money chasing too few deals – represent an absolute death knell for the availability of good returns earned with safety. It should be possible to know when this is the case, as Prince did, but people tend to join in nevertheless. Often this is true because, even if they recognize the danger, they’re also aware that “being too far ahead of your time is indistinguishable from being wrong,” and they don’t want to be out of step. The way I see it, investors face two main risks: the risk of losing money and the risk of missing out. Although investors should balance the two, in reality this is yet another of those arcs along which the pendulum swings regularly between extremes. The disposition of a market – the position of the pendulum – can be inferred from the behavior of participants regarding these two risks. In the years just before the crash, encouraged by the
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上述第 2 页所述的所谓风险降低措施,投资者往往忽视亏损风险。在那个狂热的年代,他们只担心错失良机、显得过于保守以及业务流失。这种心态促使他们采取激进策略、创新产品、杠杆操作和流动性不足的资产配置。当大多数人认为最坏的可能结果就是未能充分参与收益时,风险行为便由此而生。他们终会意识到还有更糟的情况,但这一认知可能需要很长时间才能到来。
purported risk-reducers described on page 2 above, investors generally ignored the risk of loss. In those heady times, they feared only missing opportunities, looking too conservative, and losing business. This combination spurred them to employ aggressive strategies, innovative products, leverage and illiquidity. When most people think the worst imaginable outcome is failing to participate fully in gains, the result is risky behavior. They’re inevitably reminded that there’s worse, but it can take a long time to happen.
“只有在退潮时,你才会知道谁在裸泳”
当我读到沃伦·巴菲特这句名言时,我在《一切安好》(2007 年 7 月 16 日)中引用了它,后来还专门写了一篇备忘录来讨论(《潮水退去》,2008 年 3 月 18 日)。巴菲特说话的方式兼具简洁、幽默和精准,这句话就是一个绝佳的例子。
金融创新是危机根基的重要组成部分。正如我先前所说,新投资产品的普及只有在牛市中才可能实现,因为那时怀疑被搁置,资金唾手可得,考验时刻也少之又少。另一方面,创新只有在熊市中才会受到检验,而能通过最终考验的寥寥无几。加州人的房子可能存在建筑缺陷,但只有在地震时我们才会发现。同样,一个存在致命缺陷的投资产品,在熊市考验来临之前,可以轻松存活很长时间。
2003 年至 2007 年间大规模的金融创新,是由 2000 年至 2002 年股票表现不佳以及高等级债券的低收益率驱动的。大量新产品和新策略涌现出来,在有利环境中越来越受欢迎。很少有投资者对这些产品对高杠杆的依赖、或突然泛滥的 AAA 评级感到不安,也不在乎它们未经受艰难时期的考验。
牛市创新在 2007 年至 2008 年的艰难时期被戳穿并不令人意外,但例子之多却着实让人震惊。结果发现:
“It’s Only When the Tide Goes Out That You Find Out Who’s Been Swimming Naked” When I came across the above quotation from Warren Buffett, I borrowed it for “It’s All Good” (July 16, 2007) and later devoted an entire memo to it (“The Tide Goes Out,” March 18, 2008). Buffett’s way of saying things combines brevity, humor and pinpoint accuracy, and this is a great example. Financial innovation was a major component in building the base for the crisis. As I’ve said before, popularization of new investment products is possible only in rising markets, with their suspension of skepticism, easy access to money, and dearth of trying moments. On the other hand, innovations are only tested in falling markets, and few pass the ultimate test. Californians’ homes may contain construction flaws, but we only learn about them during earthquakes. Likewise, a fatally flawed investment product can easily survive until it’s tested in a bear market. The extensive investment innovation of 2003-07 was driven by the poor performance of stocks in 2000-02 and the low yields available on high grade bonds. A large number of new products and strategies emerged, increasing in popularity in a salutary environment. Few investors were troubled by the products’ dependence on high leverage or suddenly commonplace triple-A ratings, or by the fact that they hadn’t been tested in tough times. It’s not surprising that bull market developments were defrocked in the tougher times of 200708, but it’s somewhat shocking how many examples there are. It turned out that:
涉及杠杆、流动性差或高风险资产的投资损失,可能远比预想的“最坏情况”严重得多;
贝塔曾被误认为阿尔法,正如杠杆被误认为增值一样;
“绝对收益”并非绝对,“市场中性”策略与市场高度相关;
“私募股权的黄金时代”源于宽松货币,而非廉价收购;
与投资经理分享收益,不足以使其利益与客户利益一致;
以及,“理应发生”的事情往往不会发生。
losses on investments involving leverage, illiquidity or risky assets could be much worse than the “worst case” that had been predicted, beta had been confused for alpha, just as leverage had for value added, there was nothing absolute about “absolute return,” and “market neutral” strategies were correlated with the market, the “golden age of private equity” had been a function of easy money, not bargain purchases, sharing the upside with investment managers isn’t sufficient to align their interests with those of their clients, and things that “should happen” often don’t.
虽然这是一个极端的案例,但伯尼·马多夫的故事恰如其分地展示了这一现象。马多夫虚构的回报率并不算高,但异常稳定;因此,他的客户把他的基金视为高收益的短期国债。这使得这位老练的庞氏骗局操盘手能够轻松地用渴望入场的投资者现金,来满足少数撤资请求。若非 2008 年市场崩盘,这场骗局本可能无限继续下去。马多夫的投资者完全
While an extreme case, the story of Bernie Madoff presents an apt example of this phenomenon. Madoff’s fictitious returns weren’t very high, but they were remarkably steady; thus his clients thought of his fund as a high-yielding T-bill. This made it easy for the skilled Ponzi schemer to satisfy the few withdrawal requests with cash from eager new investors. This could have continued ad infinitum if not for the market collapse in 2008. Madoff’s investors had complete
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他们信任他,却无法从那些设置赎回门槛的基金中取回所需资金,也不愿割舍其他亏损惨重的投资,不像伯尼那样风光。因此,麦道夫收到了 70 亿美元的赎回请求,这笔钱他根本无法从新一批“接盘侠”那里筹得,他的裸泳真相就此大白。
麦道夫的故事诠释了无根无据的投资如何在牛市中如鱼得水,以及熊市如何揭露它们的真面目。潮水退去后,许多危机前的“奇迹”被证明是价值空洞、过度依赖繁荣与宽松货币、顺周期、炒作过度,或干脆就是千疮百孔。但愿下一次,投资者在牛市里眉来眼去时,能多想想潮水退去后,这些风流韵事会如何收场。
confidence in him, but they couldn’t get money they needed from other funds that had put up gates, or they didn’t want to sell other investments that, unlike Bernie’s, were showing big losses. So Madoff received requests for $7 billion of withdrawals, an amount he simply couldn’t raise from new suckers, and his nakedness became apparent. The Madoff story exemplifies the ability of ill-founded investments to prosper in bull markets, and the role of bear markets in exposing them. Now that the tide has gone out, many precrisis miracles have been exposed as non-value based, overly dependent on prosperity and easy money, pro-cyclical, over-hyped or just plain flawed. Hopefully next time, investors will give more thought to how their bull-market dalliances will fare when the tide goes out.
泡沫的另一面
紧随崩盘前那些教训之后,2008 年下半年又带来几条关于危机时期行为举止的教训。当时基本面前景糟糕透顶,心理面一片低迷,技术面则充斥着大量被迫抛售,那段时间堪称我见过的最大的买入机会之一。
我的看法是,经历了崩盘前的过度乐观之后,人们现在又把悲观推向了极端。在高点和低点抗拒情绪化的极端并不容易,但正是这样做,才能做出最佳投资决策:
……正是那些不太可能发生的事件引发了信贷危机。许多被视为不太可能(如果不是不可能)的坏事同时发生在了背负高杠杆的投资者身上。所以最简单的解释是,在信贷危机中受伤的人,其怀疑精神——或者说悲观情绪——还不够。但那种[认识]触发了一次顿悟:怀疑精神和悲观主义不是一回事。乐观过头时,怀疑精神要求你转向悲观;但悲观过头时,它也要求你转向乐观。(《否定的极限》,2008 年 10 月 15 日)
钟摆摆向某个极端,是投资世界里永恒不变的现象:从乐观到悲观,从轻信到怀疑,从乐观到恐慌,从资本市场的门户大开到窗户砰然关闭,从买方多于卖方到卖方多于买方,并因此从定价过高到定价过低。所以,当我的朋友詹姆斯·格兰特的一篇文章引用了一句妙语,完美概括了这一过程的最终结果时,我兴奋不已:
英国经济学家阿瑟·皮古有一句名言,恰好点明了这个问题。“乐观的错误在危机中消亡,但它在消亡之际,又孕育出悲观的新错误。这个新错误出生时就不是婴儿,而是巨人。”(《华尔街日报》,2009 年 9 月 19 日,着重号为作者所加)
乐观情绪在泡沫中蓬勃生长。泡沫正是建立在这之上的,乐观与价格上涨相互强化。同样,危机也是由情绪急剧转向悲观所引发的。下跌途中,价格下跌与悲观情绪互为因果。
The Opposite of a Bubble On the heels of the lessons regarding the run-up to the crash, the latter part of 2008 provided several lessons about behavior in times of crisis. With the fundamental outlook terrible, psychology depressed and technical conditions featuring a great deal of forced selling, that period represented one of the greatest buying opportunities I’ve ever seen. I expressed my view that, having been too optimistic before the crash, people were now taking things too far on the downside. It’s not easy to resist emotional excesses at highs and lows, but it’s by doing so that the best investment decisions can be made: . . . it’s improbable events that brought on the credit crisis. Lots of bad things happened that had been considered unlikely (if not impossible), and they happened at the same time, to investors who’d taken on significant leverage. So the easy explanation is that the people who were hurt in the credit crisis hadn’t been skeptical – or pessimistic – enough. But that [realization] triggered an epiphany: Skepticism and pessimism aren’t synonymous. Skepticism calls for pessimism when optimism is excessive. But it also calls for optimism when pessimism is excessive. (“The Limits to Negativism,” October 15, 2008) The swing of the pendulum to one extreme or another is a constant in the investment world: from optimism to pessimism, from credulous to skeptical, from sanguine to panicked, from wide-open capital markets to windows slammed shut, from more buyers than sellers to more sellers than buyers and, consequently, from overpriced to underpriced. Thus I was thrilled when an article by my friend James Grant provided a quotation that beautifully sums up the end result of this process: To the English economist Arthur C. Pigou is credited a bon mot that exactly frames the issue. “The error of optimism dies in the crisis, but in dying it gives birth to an error of pessimism. This new error is born not an infant, but a giant.” (The Wall Street Journal, September 19, 2009, emphasis added) Optimism thrives in bubbles. That’s what they’re built on, with optimism and rising prices reinforcing each other. Likewise, crises are brought on by an extreme turn toward pessimism. Falling prices and pessimism contribute to each other on the way down.
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危机前的那几年,似乎再乐观的看法也不为过,极少有怀疑者提醒说某个想法可能过于美好,不切实际。然而,正如庇古所言,雷曼兄弟倒闭之后,情形走向了另一个极端。无论什么情境,人们总忍不住问一句:“万一比这还糟呢?”那时,再悲观的观点也有人信,仿佛没有最坏,只有更坏。
这种错误一目了然——群体在顶峰时极尽乐观,在谷底时却悲观至极。因此,要想从中获益,我们必须在乐观情绪盛行的顶部保持警醒,在悲观情绪弥漫的底部同样保持怀疑。
庇古还有一个精彩的补充:泡沫往往在时间中悄然累积,源于合理依据的逐步堆积、有利形势的不断显现、高回报的实现、陈词滥调被推向极致、人们甘愿放弃批判思维、乐观情绪的日益高涨,以及新买家的持续涌入。然而,当泡沫赖以支撑的根基一旦暴露,它往往会在瞬间崩塌。过度的悲观情绪来得极快,“生而为巨人”。就像我的合伙人谢尔顿·斯通说的那样:“气球泄气的速度,远比充气来得快。”
剑桥联合公司(Cambridge Associates)的伊恩·肯尼迪和理查德·里德尔最近发表了一篇题为《行为风险》的报告,对这一过程做了精彩解释,并描述了其后果:
[在好日子里,]我们受困于詹姆斯·蒙蒂尔所称的“控制幻觉:相信一旦事情出了岔子,我们就有能力收拾局面。”当这一幻觉在抛售恐慌中被击碎时,我们茫然不知该转向何方,也不知该相信什么……
当人类(乃至其他动物)遭受冲击时,除非受过特别训练,本能会驱使我们退缩、保存实力、寻求群体的相对安全,并寻找脱离险境的道路。这些是古老的生存本能,深植于基因之中。遭遇金融冲击时,同样的本能会导致风险厌恶情绪急剧上升(我要现金!)、投资视野急剧缩短、随波逐流地夺路而逃、把当下趋势一股脑外推到世界末日……
危机时刻,当风险厌恶飙升,恐慌的投资者往往会争先恐后涌向出口。加入他们行列的诱惑几乎无法抵挡,因为整个金融大厦仿佛正在坍塌。精心构建的模型一夜之间变得毫无意义,相关性趋近于 1.0,“肥尾”风险反而占据了主导……
市场下跌时,我们本能地感到风险在上升;市场上涨时,又觉得风险在消退。短期而言,这种直觉或许没错,因为市场短期常常靠动量运行。但对于长期投资者来说,这简直大错特错……当股市暴跌时,投资者的风险厌恶情绪反而上升,尽管基本面的风险其实正在下降。(着重号为原文所加)
In the years just before the crash, no view was considered too optimistic. There were few skeptics around to point out that a notion might be too good to be true. And then, as Pigou says, the opposite became true post-Lehman Brothers. There was no scenario of which someone wouldn’t suggest, “But what if it’s worse than that?” Now no idea was considered too negative to be true. The error is clear. The herd applies optimism at the top and pessimism at the bottom. Thus, to benefit, we must be skeptical of the optimism that thrives at the top, and skeptical of the pessimism that prevails at the bottom. Pigou makes an excellent additional point. Bubbles usually build gradually over time, the result of a steady accretion of logical basis, favorable developments, high returns being achieved, platitudes taken to extremes, willing suspension of disbelief, rising optimism and the recruitment of new buyers. But when the bubble’s faulty underpinnings are exposed, it tends to collapse in a rush. The excess of pessimism does arrive quickly, “born a giant.” Or as my partner Sheldon Stone puts it, “the air goes out of the balloon a lot faster than it went in.” A recent report by Ian Kennedy and Richard Riedel of Cambridge Associates, entitled “Behavioral Risk,” provides an excellent explanation for this process and describes its effect: [During good times,] we suffer from what James Montier characterizes as “the illusion of control: the belief that if things go wrong, we will be able to sort them out.” When that illusion is shattered during a selling panic, we don’t know where to turn or what to think. . . . What happens when we humans (and, indeed, other animals) are slammed by shock? Unless trained otherwise, our instincts tell us to retreat, conserve, seek the comparative safety of groups, and search for a path out of danger. These are ancient survival instincts, hard-wired. Slammed by financial shock, the same instincts result in heightened risk aversion (gimme cash!), a dramatic foreshortening of our normal investment time horizon, an overwhelming impulse to flee with the herd, a tendency to extrapolate current trends all the way to Armageddon . . . In times of crisis, when risk aversion spikes, panicked investors tend to stampede for the exits. The temptation to join them is well-nigh irresistible because the whole financial edifice seems to be collapsing. Carefully wrought models are rendered irrelevant overnight, as correlations converge on 1.0, and “fat tail” risk wags the dog. . . . When markets are falling, we instinctively feel that risk is rising, and when markets are rising, that risk is ebbing. In the short term, this instinct may be right since markets often run on momentum in the short run. But for longterm investors it is dead wrong. . . . As equity markets plummet, investors’ risk aversion rises even as the fundamental risk is in fact declining. (emphasis added)
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换句话说,我们的本性和情绪合谋,让我们在错误的时机做错误的事:在高点轻信,在低点忧虑,仿佛价格下跌是情绪喂养出来的,就真预示着哪里出了问题,好像 10 美元时的风险比 100 美元时还大。
In other words, our instincts and emotions conspire to make us do the wrong thing at the wrong time: to trust at the top and worry at the bottom, and to think something’s riskier at $10 than it was at $100, as if the emotion-fed price decline is correct in suggesting that something’s wrong.
低买高卖
在所有与我们正经历的极端周期相关的格言中,上面这句简单的——可能是我们所有人最早学会的一句——仍然是最重要的。
在我早年从事这一行时,那些整天专注于个股选择的人被告知,资产配置可能更重要。我想提名第三个争夺首要地位的候选者:逆周期行为。想想任何一个 3 至 5 年左右的中期阶段,市场钟摆大幅摆动(几乎每个阶段都是如此)。2004 至 2008 年就是一个很好的例子。个股选择对分散化投资组合的回报影响有限。资产配置重要得多,但主要是因为它决定了你面对市场摆动时的姿态。最关键的一点在于,你的投资是逆周期的还是顺周期的。你在底部买得更多,还是在顶部买得更多?你在顶部采取防守姿态、在底部积极进攻,还是反过来?换句话说,你是低买高卖,还是高买低卖?
剑桥研究描述了抵抗周期并反其道而行之的重要性,也指出了这样做的难度以及部分原因。但这是最重要的事。你参与了 2004 至 2008 年的错误,还是保持了抵抗?这才是关键。
抵抗——并由此作为逆向投资者获得成功——并不容易。很多因素叠加在一起造成了困难,包括天然的从众倾向,以及因步伐不一致而承受的痛苦,因为势头总是会让顺周期行为在一段时间内看起来是正确的。(这就是为什么必须记住:“过于领先于时代,与犯错并无区别。”)鉴于未来的不确定性,以及因此很难确信自己的立场是对的——尤其是当价格朝着不利于你的方向移动时——做一个孤独的逆向投资者颇具挑战。
然而,有一些东西能有所帮助。第一,即使只在投资行业待过很短时间,每个人都应该知道,群体在极端时刻通常是错的,并为自己的错误付出高昂代价。第二,一些逆向投资者的业绩相当亮眼。第三,准确解读投资者的情绪和行为——根据其他人在市场上的所作所为,敏锐地推断危险或机会——能让投资者在成为有效逆向投资者的道路上占据有利位置。
我说过,我们永远不知道自己会去哪里,但我们绝对应该知道自己在哪儿。周期并非不可知或不可战胜。上面列举的那些试金石摆在那里,人人都能看到,但很少有人充分利用。关键在于,你要成为那些充分利用它们的人之一。
Buy Low, Sell High Of all the adages that bear on the events of this extreme cycle we’re living through, the simple one just above – probably the first one any of us learned – is still the most important. In my early years in this business, people who spent all their time on security selection were told that asset allocation can be more important. I’d like to nominate a third candidate for primacy: countercyclical behavior. Consider any intermediate-term period of 3-5 years or so in which the market pendulum makes a significant swing (and that’s about all of them). The period 2004-08 presents a good example. Individual security selection had limited impact on the return from a diversified portfolio. Asset allocation mattered much more, but primarily because it determined your posture with regard to the market’s swing. By far the most pivotal thing is whether your investing was anti-cyclical or pro-cyclical. Did you buy more at the bottom or more at the top? Did you invest defensively at the top and aggressively at the bottom, or vice versa? In other words, did you buy low and sell high, or buy high and sell low? The Cambridge study describes the importance of resisting the cycle and acting counter to it. It also outlines the difficulty of doing so, and some of the reasons. But it is the most important thing. Did you participate in the errors of 2004-08 or resist? That’s the key. Resisting – and thereby achieving success as a contrarian – isn’t easy. Things combine to make it difficult, including natural herd tendencies and the pain imposed by being out of step, since momentum invariably makes pro-cyclical actions look correct for a while. (That’s why it’s essential to remember that “being too far ahead of your time is indistinguishable from being wrong.”) Given the uncertain nature of the future, and thus the difficulty of being confident your position is the right one – especially as price moves against you – it’s challenging to be a lonely contrarian. A few things that can help, however. First, after even a little time spent in the investment business, everyone should know that the herd is usually wrong at the extremes and pays dearly for its error. Second, some contrarians have records that are very impressive. And third, an accurate reading of investor mood and behavior – perceptive inference of danger or opportunity based on what others are doing in the market – can give investors a good leg up toward being effective contrarians. I say we never know where we’re going, but we sure as heck ought to know where we are. The cycle isn’t unknowable or unbeatable. Touchstones like those enumerated above are there for everyone to see, but few people take full advantage. The key is to be among those who do.
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哲学家汉娜·阿伦特曾写道:
……无论我们多么善于从过去中学习,它也无法让我们预知未来。(《极权主义的起源》,1951 年)
我们无法知晓未来会发生什么,历史也无法告诉我们。但意识到这一局限性,本身就至关重要。领会这一点,能提高我们投资成功的概率。
The philosopher Hannah Arendt wrote: . . . no matter how much we may be capable of learning from the past, it will not enable us to know the future. (The Origins of Totalitarianism, 1951) We cannot know what the future holds, and history cannot tell us. But awareness of that limitation is a key lesson in itself. Mastering it increases our likelihood of investment success.
November 10, 2009
November 10, 2009
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2009 Oaktree Capital Management, L.P.
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