From the Archives: In Praise of the Dead (Investors)

This column was originally published on Oct. 6, 2015.

Do Less, Make More
Google "Fidelity dead investors" and you'll see a number of stories come up. The Conservative Income Investorinforms that when conducting an internal performance review of customer performance from 2003 to 2013, Fidelity learned that those with the best returns were "either dead or inactive." Hedge fund manager Mohnish Pabrai refers to that study in a speech. In June, Moneyvator.com upgraded the finding's status to public, writing that Fidelity had "released a study" to that effect.

Well, maybe. My Fidelity contact has not heard of such a thing, nor has Morningstar's Fidelity Canada contact. Suffice it to say that none of these citations came linked to the original source. (Such is the Internet.)

However, the general notion is sound. As William Sharpe explained decades ago, and institutional investors have learned to believe fervently (no split infinitives here!), investing is a zero-sum game. One side wins on a trade, the other does not. More trades lead to more costs, which must be overcome by notching more than one's share of wins. Sure, that can happen. But for a great number of investors, on average? Highly unlikely. Even if Fidelity's retail customers trade as well as professionals, and are not beaten in aggregate by portfolio managers, as a group they don't figure to overcome the friction caused by trading costs.

Penny Wise
My argument, for this half of the column, is not about making bad trades. I don't believe that retail investors make worse trades, in aggregate, than do professional portfolio managers.

Part of the reason for that statement is basic math. If active mutual fund portfolio managers, who control a large amount of professionally managed stock assets, break even as a whole after their funds pay operating expenses and trading costs (which they do), then it would seem that professional management does not register a plus sign on the ledger. If that is true, the amateurs cannot score a minus. The game sums to zero.

The other part of the reason is that this subject has been tested directly. When Berkeley professor Terry Odean published his landmark study of retail investing results in the 1990s (to the sighs of one of my business school professors, who said "I sure wish I had that database"--Odean had somehow talked a large discount-brokerage firm into giving him the information, with the customers' names redacted), he found that performance aligned neatly with costs. The highest traders had the worst results, which roughly equaled the market performance minus the costs of their trades. Those who barely touched their accounts enjoyed nearly the market results.