MOHAMMED MAHJOUB/AFP/Getty Images Not much has fundamentally changed since the 1987 stock market crash, and some things have gotten worse.Thirty years ago Thursday, the U.S. stock market had its worst day ever. On Oct. 19, 1987, the Dow Jones Industrial Average lost 508 points, 22.6% of its value. It was early in my journalism career and I remember the fears that, like Oct. 29, 1929, it would lead to a second Great Depression. That didn’t happen, of course — the next recession began nearly three years later, in July 1990 — and because of that, people dismiss the 1987 crash as just a one-day blip.via