PBS访谈
你的头脑与你的金钱——从众心态 | 《晚间商业报道》| PBS http://www.pbs.org/nbr/site/onair/transcripts/herd_mentality_100215/
Your Mind and Your Money-Herd Mentality | Nightly Business Report | PBS http://www.pbs.org/nbr/site/onair/transcripts/herd_mentality_100215/
你的大脑与你的金钱——羊群效应,2010 年 2 月 15 日,星期一
Your Mind and Your Money-Herd Mentality Monday, February 15, 2010
汤姆·哈德森我们知道人类是社会性动物。这意味着我们非常看重作为群体一员的身份。那么这种从众心态是否也会延伸到我们的投资方式上?在接下来的报道中,丹将审视相关证据。
TOM HUDSONWe know that human beings are social animals. That means we place a high value on being part of a group. So does that herd mentality also extend to how we invest? In his next report, Dan looks at the evidence.
丹·格雷奇你有没有注意过,动物总是成群结队地移动?无论是鸟、大象还是牛,它们似乎都有同样的抱团本能。问题是:我们人类是否也有这种从众行为?
DAN GRECHHave you ever noticed how animals tend to move together in groups? Whether it's birds, elephants or cows, they all seem to share the same instincts to herd. The question is: do we as humans share this same herding behavior?
彼得森从众行为,是人们在信息不足时的反应——以为身边其他人能给我们提供一条决策捷径。
PETERSONHerding is a response to having not enough information and thinking that others around us can actually give us a shortcut to how to make a decision.
格雷奇理查德·彼得森博士是一名精神病学家,现在管理着对冲基金。他说,从众的冲动可以追溯到我们最早的祖先。
GRECHDr. Richard Peterson is a psychiatrist who now manages hedge funds. He says the impulse to stick with the group dates back to our earliest ancestors.
彼得森假如我们在塞伦盖蒂草原上的一群人当中,有一个人开始跑,我们很可能要么得注意他在躲避什么,要么就跟着他一起跑——因为不这么做的人,就会成为狮子的盘中餐。
PETERSONIf we're in a group of people in the Serengeti and one person starts running, we probably either want to pay attention to what they're running away from or start running with them, because those who didn't do so would be a meal for the lions.
格雷奇如今,狮子已经不是大问题了,但归属某个群体的渴望依然根深蒂固。从众安全(safety in numbers)是人们加入投资俱乐部的原因之一,比如佛罗里达州棕榈滩花园的北极星投资俱乐部。俱乐部成员每月聚会一次,投资他们存入资金池的现金。萨莉·埃斯科特是 15 年前帮助创立这个俱乐部的人之一。她说,这个群体的一大优势在于成员们并不总是一致。
GRECHToday, lions are less of a problem, but the desire to be part of a group still runs deep. Safety in numbers is one reason people join investment clubs like the Polaris investment club in Palm Beach Gardens, Florida. Once a month, club members meet to invest the cash they've put in the treasury. Sally Escott helped found the club 15 years ago . She says one strength of the group is that members do not always agree.
萨莉·埃斯科特(北极星投资俱乐部):我们倒没到拳脚相向的地步。就是争论,投票赢了当然好,输了也没关系。自己按自己的想法去做呗。
SALLY ESCOTT, POLARIS INVESTMENT CLUB: We don't get to the fisticuffs stage. We just debate and if you're on the winning side of the vote, that's fine and if you're not, that's OK. You go do it on your own.
格雷奇这种多元的独立观点帮助北极星俱乐部连续八年在全美投资组合竞赛中获胜。联合创始人莱恩·吉尔曼表示,在其他投资俱乐部里,集体思维往往占据上风。
GRECHThat range of independent views has helped the Polaris Club win a national portfolio contest eight years in a row. Co-founder Len Gilman says in other investment clubs, group-think often prevails.
莱恩·吉尔曼,北极星投资俱乐部:我们俱乐部里没有人垄断、强行主导或过度影响他人——而这一点正是有些投资俱乐部衰落的原因。
LEN GILMAN, POLARIS INVESTMENT CLUB: Our club does not have anybody who is monopolizing or strong-arming or over influencing others and this has been the downfall of some investment clubs.
GRECH研究发现,与多数人唱反调极其困难。人们通常会选择压抑自己的观点。格雷戈里·伯恩斯博士是埃默里大学的神经经济学家。在他的一项实验中,研究人员向志愿者展示各种形状不同的三维方块,并询问他们:这些方块相同吗?当志愿者独自作答时,他们几乎总能给出正确答案:方块是一样的。
GRECHStudies have found that going against the majority is incredibly hard. People will generally suppress their own opinions instead. Dr. Gregory Berns is a neuro-economist at Emory University. In one of his experiments, volunteers were shown three-dimensional blocks in various configurations. They were asked: are the blocks identical? When the volunteers were alone, they almost always gave the correct answer: the blocks are the same.
但当这些志愿者被告知要与被训练故意给出错误答案的人一起作答时,他们改变了主意,说木块是不同的。
But when they were put with people coached to give the wrong answer, the volunteers changed their minds. They said the blocks were different.
伯恩斯称,脑部扫描揭示了原因。取悦群体的愿望如此强烈,以至于它实际上改变了志愿者们观察积木的方式。
Berns says brain scans revealed why. The desire to please the group was so strong, it actually altered the way the volunteers saw the blocks.
伯恩斯就我们大脑而言,其实并不存在什么现实。所谓的现实,是我们自己在头脑中构建出来的。而这个过程会受到其他人的影响。
BERNSThere is, as far as our brains go, kind of no reality. The reality is what we construct in our mind. And that's influenced by other people.
格雷奇因此,脑部研究证实,人们对同伴压力极为敏感,但有些人能够抵御这种压力。他们不害怕逆流而行。这些人被称为“反叛者”。在投资者中,沃伦·巴菲特就是这样一位反叛者。他经常逆华尔街的传统智慧而行。彼得森认为,做反叛者看似有风险,却往往能带来丰厚回报。
GRECHSo, studies of the brain confirm that people are very sensitive to peer pressure, but some people are able to withstand that pressure. They're not afraid to go against the crowd. They're called iconoclasts. Among investors, Warren Buffett is an iconoclast. He often goes against conventional wisdom on Wall Street. Peterson says being an iconoclast may seem risky, but it's often profitable.
彼得森在当今的金融市场里,你要是看到了某个危险,基本可以肯定所有人都看到了那个危险。实际上,到头来往往是你在看到危险的时候买入最好。这非常讽刺,但金融市场的确是彻底反直觉的。
PETERSONIn the financial markets of today, if you see a danger, you can probably bet that everybody else has seen that danger, as well. And in fact, it turns out it's probably best to buy at that time when you see the danger. It's very ironic, but financial markets are completely counterintuitive.
格雷奇所以从众行为对牛来说或许是好事,但如果你是一名投资者,即使是看涨的投资者,这也是一种你可能想要避免的动物行为。丹·格雷奇,《晚间商业报道》,新泽西州樱桃林农场。
GRECHSo herding may be good for cows, but if you're an investor, even a bullish one, it's one form of animal behavior you may want to avoid. Dan Grech, NIGHTLY BUSINESS REPORT, Cherry Grove Farms, New Jersey.
赫德森这些关于从众效应的研究还表明,我们的投资决策可能受到隐藏心理因素的影响。既然如此,你如何才能掌控自己的决策,做出正确选择?为了找到答案,让我们请两位将行为研究成果用于提升投资业绩的专家:迈克尔·莫布辛,哥伦比亚商学院金融学兼职教授,《思考两次》作者;以及丹尼丝·舒尔,Re-Think Group 与 Trader Psyches 公司首席执行官,她在那里为专业交易员提供神经经济学和行为金融学方面的咨询。我们也很高兴欢迎罗伯特·弗里克,《吉普林个人理财》高级编辑,他正在为《吉普林》杂志撰写“你的心智与你的金钱”专题。首先,迈克尔,你确信我们大脑的运作方式经常导致投资者犯下一些相当严重的错误,是不是?
HUDSONThose findings on herding also suggest our investment decisions may be swayed by hidden psychological factors. So, if that's the case, how can you take control of your decision making and make the right choices? To find out, let's go to two people who use behavioral research findings as a means to improve investment results: Michael Mauboussin, adjunct professor of finance at Columbia business school, author of "Think Twice" and Denise Shull. She's CEO of Re-Think Group and Trader Psyches, where she advises professional traders on neuro-economics and behavioral finance. We're also happy to welcome Robert Frick, senior editor of "Kiplinger's Personal Finance", who's covering "Your Mind and Your Money" for Kiplinger's. Now, first, Michael, you're convinced the way our minds work frequently leads investors to make some pretty bad mistakes, so does it
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你的头脑与你的金钱——羊群效应 | 夜间商业报道 | PBS http://www.pbs.org/nbr/site/onair/transcripts/herd_mentality_100215/
Your Mind and Your Money-Herd Mentality | Nightly Business Report | PBS http://www.pbs.org/nbr/site/onair/transcripts/herd_mentality_100215/
无论我们多么聪明,投资真的取决于我们有多聪明吗?
matter how smart we are investing?
迈克尔·莫布森,哥伦比亚商学院兼任教授,《再想一次》作者:没错,你有多聪明并不重要,因为我们所有人用的都是同一套心理软件。而且,有一个我们所有人都共有的认知偏差,不管你是聪明还是不那么聪明,那就是一种外推的倾向。所以,如果我们看到了好的结果,我们就认为它会永远持续下去;如果我们看到了不好的结果,我们也认为它会永远持续下去。这就导致了我认为投资中最大的错误——无法区分基本面与预期。基本面,基本上就是公司在销售和利润方面的表现,而预期则是已经反映在股价里的东西。这是两个截然不同的概念,你必须要寻找它们之间的脱节之处,也就是市场错误定价预期的地方。这才是关键——投资者的核心任务。
MICHAEL MAUBOUSSIN, ADJUNCT PROFESSOR, COLUMBIA BUSINESS SCHOOL, AUTHOR, THINK TWICE: Yeah, how smart you are doesn't matter because we all come with the same mental software. And there is one bias that all of us share, whether your smart or not as smart and that is a tendency to extrapolate. So what we -- if we've seen good results, we think they're going to go on forever. If we've seen something bad, we think it's going to go on forever. And that leads to what I think is the biggest mistake in investing, which is failure to distinguish between fundamentals and expectations. Fundamentals, basically how the company is going to perform in terms of sales and profits and expectations is what's embedded in the stock price. Those are two really different things and you have to look for the disconnects and where the market's mis-pricing expectations. That's the key -- the key task for investors.
哈德森迈克尔,那说到忽略人群、忽略羊群效应,并且有勇气和信心说你认为市场可能是错的,这点你怎么看?
HUDSONMichael, what about kind of ignoring the crowd, ignoring that herd and having the courage and the confidence to say you think maybe the market's wrong.
莫布辛要成为真正伟大的投资者,首先你必须是一个逆向投资者。所以你得跟大众背道而驰。但我要把话说清楚:为了逆向而逆向,并不是一个好主意。换句话说,电影院着火了,你应该往外跑,对吧?别往里冲。但一旦你确认了自己可以逆向操作的情境,还有第二个考验。第二个考验就是回到我一开始提到的——衡量基本面与预期的差距。因为如果大众把某件事推向了极端,无论是看多还是看空,那都应该体现在基本面与预期的背离之中。而正是这种背离,让你得以做出好的投资决策。
MAUBOUSSINTo be a really great investor, you first do need to be a contrarian. So you have to be going against the crowd. But let just me be really clear about this. Being a contrarian for the sake of being a contrarian is not a good idea. In other words, when the movie theater's on fire, run out the door, right? Don't run in the door. But once you identify a situation where you think you can be a contrarian, then there's a second test. The second test is going back to what I mentioned at the outset, measuring the difference between fundamentals and expectations. Because if the crowd takes something to an extreme, either on the bullish side or the bearish side, that should show up in your disconnect between fundamentals and expectations. And that is what allows you to make a good investment.
HUDSON丹尼斯,那如果忽略周围人群的看法呢?
HUDSONDenise, what about kind of ignoring the crowd?
丹妮丝·舒尔,再思考集团及交易心理公司首席执行官:嗯,如果你认真想一想,任何人做风险决策时试图回答的唯一问题就是,将来别人愿意为这个东西付多少钱。你无非就是希望一年后或五年后有人能从你手里花更高的价格买走。所以,如果你问一下那种所谓的“社会性问题”——我们称之为社会性问题,比如三年、五年或无论你设定的时间框架内,谁会为这个出更高的价?他们又为什么愿意出更高的价?实际上,你就是在顺应大脑看待市场的方式,甚至更容易看清概率——如果你从“哪一群人可能会买入”这个角度来思考的话。比如说,我现在凭什么比他们知道得更多,将来又有谁会了解到什么信息,从而愿意从我手里以比我买入价高出 25% 的价格买走?
DENISE SHULL, CEO, THE RETHINK GROUP & TRADER PSYCHES: Well, if you really think about it, the only question anyone's trying to answer when they make a risk decision is what somebody else is going to pay for this in the future. You just want somebody to buy it from you for more a year from now or five years from now. So, if you actually asked sort of the social - - what we call the social question, like who's going to pay more for this, three years, five years, whatever your time frame is? And why are they going to pay more for it? You're actually working with the way your brain sees markets and actually even is easier to see probabilities, if you think in terms of which group of people might be buying this. Like, how is it that I know more now than they know and who's going to find out what down road so that they'll buy it from me for 25 percent more than I paid for it.
哈德森好的,让我们请出《基普林格个人理财》的鲍勃·弗里克。
HUDSONAll right, let's bring in Bob Frick of "Kiplinger's Personal Finance."
罗伯特·弗里克,《基普林格个人理财》高级编辑:嗯,我们在几乎所有偏见中发现的一个问题是,如何从情绪化思维转向逻辑性思维?所以,我的意思是,我向两位提的问题实际上是:我们如何知道什么时候该用什么,以及如何停止情绪化?如何开始变得理性?如何让自己进入正确的心态,做出恰当的决定?
ROBERT FRICK, SR. EDITOR, KIPLINGER'S PERSONAL FINANCE: Well, one of the problems that we identify in almost all of these biases is how do you move from emotional thinking to logical thinking? So, I mean, my question to both of you really is how do we know when to use what and how do we stop being emotional? How do we start being logical? How do we get ourselves in the right frame of mind to make the proper decisions?
SHULL那我就在这儿插一句,鲍勃。基本上,如果你对自己的情绪有意识,你就有机会做出更理性的决策。
SHULLWell, I'm going to jump in their, Bob and say that basically if you're emotionally aware, you have a chance of making a more rational decision.
而实际上,研究颇具讽刺性地表明:那些情绪最强烈、但又能意识到自身情绪状态的投资者,才能察觉自己正受到何种偏见影响,从而有机会客观审视问题,看到迈克尔所说的更宏观的数据图景。但我们的教育从未教导我们,要把情绪感知作为决策的一部分来运用。然而它始终存在,我们根本摆脱不了。你看,自信、恐惧与贪婪,这些情绪始终如影随形。所以我们主张:把情绪当作数据来使用,去理解它们——讽刺的是,你反而因此有了变得更理性的机会。
And actually, research ironically shows that, that investors who are both the most emotional but aware of what those emotions are can then be aware of what bias they're operating under and then they have a chance of looking at it objectively and being able to see the bigger picture data set that Michael's talking about. But we haven't been taught to use emotional awareness as part of our decision making. It's there, though. We can't really get away from it. I mean, look at confidence versus fear versus greed. They're always there. So our argument is use them as data and understand and then you have actually a chance of being more rational, ironically.
莫布辛我插一句。首先,我想呼应丹尼斯刚才说的,我觉得她讲得完全正确。当你作为投资者或任何专业人士面对某些特定情况时,你的思维往往会把引向一条路,而更好的思考方式却是另一条路。所以,我也想补充说,了解这类场景、了解自己在哪些地方容易犯错,会非常非常有帮助。所以,再说一遍,不是说你该没有情绪,或者不该察觉自己的情绪,而是要留意它、意识到你什么时候踏进了潜在的决策危险区。
MAUBOUSSINIf I could just jump in. First of all, I want to echo want Denise said. I think that's absolutely correct. When you're faced with certain types of situations as an investor or any kind of professional, your mind is often going to take you down one path, when a better way to think about that problem is a different way. So, I would also say learning about these kinds of situations and learning where you're likely to wrong, can be very, very helpful. So, again, it's not that you should be non-emotional, or not be aware of your emotions, it's to be tuned into that and sort of recognize when you walk into potential decision- making danger zones.
弗里克没错。我在制作这个系列节目时发现——我想我在《晚间商业报道》的同事们也会认同——关于识别这些偏见的研究已经做了很多,但帮助人们克服偏见的做法却少之又少。迈克尔,这是你在研究中发现的吗?
FRICKRight. Now it seems to me in working on this series -- and I think my colleagues at NIGHTLY BUSINESS REPORT would agree -- that there's been a tremendous amount of research done identifying these biases, but very little done helping people overcome them. Michael, is that what you found in your research?
莫布森是的,我完全同意,而且我认为这是很多人共同的想法。他们读到过这些东西,但不知道该如何应对。我只简单提两点。第一是保持决策日记。当你做出一个重要决定时,写下你做了什么决定、你预期会发生什么,以及,毫不夸张地说,你的感受。你的身体感觉如何?你的情绪感觉如何?这能让你审计自己的决策。我们总是倾向于寻找能证实自己的信息。还有一样东西叫后见之明偏差。
MAUBOUSSINYeah, I completely agree with that, and I think that's the sentiment a lot of people have. They read about these things, but they don't know what to do about it. I'll just mention a couple of things very quickly. The first is keeping a decision making journal. When you make an important decision, write down what you decided, what you expect to have happen and, literally, how you feel. How do you feel physically? How do you feel emotionally? And that allows you to audit your decisions. We always look for confirming information. There's also something called hindsight bias.
事情一旦发生,我们就觉得自己当时就知道结果会发生,而且认为其概率比实际要高。所以,日记在那方面会非常有帮助。我要提的另一件事是检查清单。有时检查清单能非常、非常有效地改善我们的结果,而完全不需要提高我们的技能。
Once something happens, we think that we knew what was going to happen with a higher probability than we actually did. So, a journal can be really helpful there. Another think I'll mention is a checklist. Sometimes checklists can be very, very helpful in proving our outcomes without improving our skill at all.
哈德森我们的讨论只能到这里了。迈克尔·莫布森、丹尼斯·舒尔和罗伯特·弗里克,非常感谢你们的参与。
HUDSONAnd we're going to have to stop there. Michael Mauboussin, Denise Shull and Robert Frick, thanks so much for joining us.
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