The Math Hustle

Institutional Investor has a very good article on Wall Street’s abuse of math. Let me explain. Financial economics has an inferiority complex. As a result, the field needlessly uses fancy math to justify itself. This seeps into money management.

The financial industry uses mathematics in a manner that would be mortifying to any other field of science. Academic literature and industry research are rife with pseudo-mathematical nonsense. You don’t have to look far to see where the motivation lies: Many of the authors are either employed by or retained by richly paid investment management and consulting firms. Faced with soaring investor interest in algorithm-powered investment strategies, the habit — indeed, the requirement — today is for firms to use scientific language and notation to nourish the idea that they’ve proved mathematically that there’s a way to systematically beat the market.

They haven’t.

It’s not surprising that more is claimed by their suggestive language than they actually “prove” because the field suffers from a subtle corruption. There is a pattern developing of publishing a semi-quantitative paper and using it as the basis to establish an investment advisory firm, become the seller of an investment product “relying only on math,” and go off on a globe-circling marketing bender. The fastest-growing asset management firms are purveyors of investment products that draw upon mathematical finance research, so theories ridden with poorly specified mathematics and wildly exaggerated results abound.

Posted by on November 6th, 2018 at 10:23 pm


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