Hacker News new | ask | show | jobs
by hsitz 3354 days ago
You say "A disbeliever in EMH should look to identify these managers and pay them some fee".

In the next breath you say that even if the EMH is false "individuals investors should act as if it were true".

This makes your post somewhat ambiguous; not so clear about which position you're advocating. How "plausible" is it that these managers are "impossible to identify ex ante."? Why is it plausible? "Impossible" seems like a pretty strict standard (akin to strong EMH), why not just say instead that identifying such managers before they outperform is "practically impossible" or just "really, really, damn hard and something that you're deluding yourself about if you think you can do it."

Also (assuming it is your position), it's important to clarify that you don't disagree with the assertion that many people do identify market-beating managers before they outperform. Probably millions of people have done it; it happens every day. What they don't do (in my opinion) is use skill or knowledge to identify the outperforming managers. If they do identify an outperforming manager (of which there are always many) it happens because of chance or luck. (Just as, IMO, the outperformance itself of almost all outperforming managers is due to luck or chance, not skill.)

2 comments

Here's perhaps a better way to say what I'm getting at: identifying and investing with a manager that predictably outperforms a benchmark is just as difficult an intellectual challenge as constructing a portfolio that outperforms that same benchmark. Both of these tasks are so difficult as to be essentially impossible for an unsophisticated retail investor.
I'll throw you a better analogy, identifying and hiring an outperforming programmer should be much simpler than identifying and hiring outperforming investment managers because there is relatively little effect of chance on programming output and measurement of success is mostly objective.

Yet we know that hiring for programmers is utterly hopelessly broken beyond all belief, industry wide.

Therefore its very unlikely that people of a similar cognitive and training level that utterly failed at hiring programmers could possibly select outperforming investment managers given that being an even more difficult job. No one in HR or management is going to be selecting outperforming investment managers.

Its possible that someone outside HR and management is better at selecting the best programmers. Certainly plenty of advice from outsiders is given to hire more of coincidentally highly politically correct demographic group A or group B. Or perhaps ivy college admissions officers magically know how to pick future great programmers (LOL). Professors and college advisors might put forth a weak argument in their own favor. Still, money seems to talk and greed means management and HR, however awful they are at selecting programmers, none the less are the best skilled at it, regardless how low that skill level is.

Is it really worth saying that Lotto winners "Identified the correct lottery numbers"? It's true, I guess. But it doesn't really have any value, if that's all you mean.

(And yes, I understand that you agree with the conclusion there. But I'm saying what's the point of the verbal gymnastics in the first place?)