Definition of Day Trader

Idiot.

— Jason Zweig, The Devil’s Financial Dictionary

Zweig’s definitions point to a brutal truth: in a market dominated by high-frequency algorithms and institutional behemoths, the individual day trader is often playing a game they’ve already lost. When someone "day trades," they aren't just betting on a stock; they are betting that they are smarter than the collective processing power of Wall Street. Zweig’s "Idiot" label refers to the overconfidence bias that makes people believe they are the exception to the rule.

Invest wisely.
Carpe Diem.