Thirty years ago today, the very first exchange-traded fund started trading on the American Stock Exchange. At the time, Bill Clinton had just moved into the White House and America was trying on a new role as the world's lone superpower. On Wall Street, an entire industry soon realized that the ETF was a revolution all its own. Today, there are more than 3,000 ETFs listed in the US,  plus another 6,000 international ones, and together they hold $6.8 trillion in assets.

In “The ETF Story,” a special six-episode series originally published five years ago, Eric and Joel explore the origins of the first ETF and how it’s come to dominate investing. Among those interviewed are Jack Bogle, Kathleen Moriarty, Bob Toll, Howard Kramer, Rob Arnott, Dave Ritter, Reggie Browne, Dave Nadig, John O’Brien, Bruce Bond and more. 

Here's episode 1. On Monday Oct. 19, 1987, the stock market fell 23 percent, the worst day ever for stocks two times over. It was in the aftermath of that crash that the idea for exchange-traded funds was born. And it came from a very unlikely place: the U.S. Securities and Exchange Commission.