Some day investors will measure the duration of their investments by the tenths or even hundredths of a second.
The high-frequency trading that dominates markets these days has pushed the average holding time of a stock to unimaginably short durations, already.
Securities and Exchange Commission chairwoman Mary Schapiro says she’s worried about the influence high-frequency trading has on markets.
If an investor is only holding a stock for minutes or seconds at a time, who has time to care what a company does?
Click here to read my column in The Sunday Wall Street Journal.