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Nutty Professor's avatar

Thanks Garrett. Great stuff.

Can you comment on the possibility that the frequency of black swan events is related to algo (increasingly influenced by AI) trading? In 1987 (grad school...yes I am old), someone I can't remember the name of came to Stanford to give a seminar IN THE ENGINEERING DEPARTMENT on short term forecasting of the stock market (eigen-modes and such) and how to exploit 8 minutes of future performance to make a pile of money. The discussion period was fixated on the notion of this question: What fraction of the trading following such a strategy would lead to feedback (stabilizing or destabilizing) that could then "drive" the market?

I don't know about you but wherever I click these days I get about 50% ads to hook retail investors into AI guided training. You can say I must have clicked one of them to get that frequency but in fact I have skipped them all. Given that frequency, I have to figure they ARE getting "takers" for this (ads cost money) and this makes me wonder how much of the story about retail investors supporting the bubble (told as a confidence measure when all the studies say otherwise) while smart money has pulled back is driven by AI guided "algo" trading? Of course AI is "learning" its own feedback but, if its objective function is to capture short term gains without a significant penalty (like ALL investors have) for sharp downturns this seems like it has to end badly.

So, I will ask some curious questions (that are 38 years old...probably older than half of the retail market):

1) what fraction of retail trading do you think is currently AI guided? (is there any data on it)

2) what fraction do you think is the "tipping" point- where investing on principles and reasoning becomes meaningless because all that matters is what AI thinks of the signals?

Put another way, you mention watching for these 3 and 4 sigma events that are expected every 63 years but already they are a couple times a year and, if my concern is valid, we should expect them to be more and more frequent to the point that, if nothing is done to de-incentivize this (some sort of trade friction...seems what we have is insufficient), we are at the mercy of watching the markets either self destruct (crash or other) or just become a game of trying to catch black swans (at which point that name is meaningless if not already).

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Jeff Page's avatar

Well, with that happiness, I'll have to add my two favorite baseball players, the problem is they're both tied for first!

I'm from Houston so I'll say Nolan Ryan first and then mention my other #1 is (drum roll please) Cal Ripken Jr. Bless them both for longevity! Can you believe 2,632 straight games, all with Baltimore?

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