The Finance Curse

Michael EdessesThe views presented here do not necessarily represent those of Advisor Perspectives.

I was recently interviewed by a podcaster named Ari Block, who attended the University of Chicago Booth School of Business. He had taken at least one course from economics Nobel Prize winner Eugene Fama, an experience of which he was evidently proud.

On the podcast he told me a story about an event in Fama’s class that he thought I would appreciate. He said, “I’ll share with you something that Fama said in one of our classes. Somebody asked him, ‘Oh, Professor Fama, what do you think about artificial intelligence when it comes to day trading?’ And Fama said, ‘I think all day trading is artificial… intelligence.’” And, of course, everybody immediately started laughing.”

And then my host, Block, said, “And then Professor Fama said something incredibly interesting and he explained how the day traders are actually the police force of the market and that just blew me away, I thought that was so interesting.”

What he meant was that though the day traders don’t do themselves much good, they provide needed liquidity to the market. This liquidity facilitates price discovery — a common shibboleth.

To Block’s chagrin, I suspect, my immediate response was, “Yeah, I don’t really agree with that.”

According to FINRA, the Financial Industry Regulatory Authority, in 2023 the number of average daily stock trades was more than 74 million. The average daily trade volume was $516.5 billion. Yet liquidity mavens think that is needed to guarantee liquidity. I was skeptical of that for a long time — it didn’t sound like it made sense.