Just a few years ago, America’s stock market was the envy of the world. Thanks to new technology, friendly regulation, and the innovativeness of the financial services industries, it was open to anyone, anywhere, anytime. On-line brokerages like E*Trade let individual investors buy and sell just a few hundred dollars’ worth of stock from their homes or offices at the push of a button and for little or even no cost. A favorable tax regime on pension savings and sophisticated tools for retirement planning offered by the likes of Fidelity made it easy—even essential—for the average citizen to join the fun. Web sites like TheStreet.com and CBS MarketWatch kept stock market junkies up-to-date with breaking stories 24 hours a day, seven days a week. Americans poured into the market by the millions, and the more they invested, the more liquid, accessible, and attractive the markets became.

A version of this article appeared in the July 2003 issue of Harvard Business Review.