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A former Citadel PM on why funds actually blow up. Feels relevant these days: "It's much more common that people say: I had this incredible thesis, incredible differentiation." "But I screwed up on portfolio construction and risk — I blew up that way, not the other way around." "Walk...

114,292 просмотров • 1 месяц назад •via X (Twitter)

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Ex-Citadel PM Rich Falk-Wallace (Rich Falk-Wallace) on why 90% of hedge fund blowups are portfolio construction — not bad ideas. Rich Falk-Wallace (PM @ Citadel | Viking Global | Silver Point | Now founder & CEO of Arcana Arcana — risk & portfolio software used by ~7 of the 10 largest multi-manager hedge funds) "When they blow up, the story is never 'Shucks, I actually am not as brilliant as I was before.' What they got wrong was risk, portfolio construction." We cover: - Why 90% of PM failures come from sizing & portfolio construction, not thesis quality - The only two ways to survive long-term: extreme hit rate/slugging, or managing ex-ante correlation - The math of 10 pods long the same trade: factor bets compound, idio bets diversify - Why LTCM is the classic backward-looking correlation failure — and why ex-ante is the whole job - The paradox: "pure fundamental" concentrated funds take the biggest factor bets (up to 80% R²) - Why the best PMs treat every factor exposure like a stock position — same limits, same diligence - Sharpe ratio as a t-statistic against the null hypothesis that you have no skill - The tiger cub who moved to a pod seat and said it felt like playing a video game - Are junior analysts screwed? Dispersion, not extinction - His contrarian take: capital is opening up beyond the Big Four via SMAs Highlights: (00:00) Intro (01:10) The real job of a hedge fund PM: a product sold to allocators (02:52) The 90% failure vector: risk leakage, not bad theses (10:25) Two ways out: hit rate/slugging vs. managing correlations (18:17) Factor bets compound, idio diversifies: why 80% idio becomes 60% at scale (27:33) Factor models as the "perfect benchmark" for every stock at every moment (38:57) The old-school PM who calls factors bullshit — Rich's answer (44:48) Treat factors like stock positions: limits, diligence, sizing (55:29) Why concentrated "pure fundamental" books take the biggest factor bets (01:05:34) Are junior analysts screwed? AI, mock books, & dispersion (01:15:52) Contrarian take: SMA capital opening up beyond the Big Four (01:19:42) The #1 new-launch killer: trying to do too many things at once

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524,387 просмотров • 1 месяц назад

Chamath on H1-B visa: There's a lot of people that look at me and say 'That guy is part of the problem' you can see it in the comments on X." "I came on an H1B visa. Elon came on an H1B visa, okay? This is in the early 2000s. Why? Nobody was applying for these things. And who did you have? Forget about me, I'm relevant, but you had guys like him, you had these incredible scientists, Urs Hölzle that ends up at Google. These are giants, okay?" "What's happening now, for the last 15 or 20 years, you have farms of applications. 20,000 slots open up, so you can't stipulate abuse because what that means is so overwhelming that the next Elon or Urs Hölzle was already gone. I sure as shit would never say that the program works today." "So I think it's fair to say two things. We can stipulate the following two things: Immigration is really good. We should be attracting the best. But we should also make it fair for the best who have, for the last five years, been blocked because a handful of companies have abused this system. You need to stop and fix it so that you can reestablish trust with the American population at large. There's a lot of people that look at me and say, 'That guy's part of the problem.' You can see it in the comments on X. And I'm like, 'Wow, me?'" "No, I think that's because they see the abuses on the ground. They see the people that show up and they're like, 'This person is not smarter than me. All I can see is wage suppression.' We have a responsibility to the people who are working and paying into the system to answer their questions honestly. You can't stipulate and ignore it. You can't. Sometimes you gotta say, 'You know what? That was gross abuse.'"

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216,768 просмотров • 2 месяцев назад