Video: '1929 Wall Street Stock Market Crash' (Oct. 29, 1929, at 5:41)

(Black Tuesday, October 29, 1929, 10:00 a.m.-3:00 p.m. EST) — On the fourth and final day of the Wall Street Crash of 1929, stock prices virtually collapsed today, swept downward with gigantic losses in the most disastrous trading day in the New York Stock Exchange’s history.

Investors traded a record 16.4 million shares as panic selling reached its peak.

Video: 'Herbert Hoover Biography' (Oct. 1929, at 12:28)

$14 billion in open market values was lost, wiping out thousands of investors and setting the stage for the Great Depression, the longest, deepest, and most widespread economic downturn in the history of the Western industrialized world up to that time.

Video: 'The Crash of 1929 & The Great Depression (PBS) 5of6' (Oct. 29, 1929, at 6:03)

The Dow lost an additional 30 points, or 12 percent.

The Dow would continue to slide for three more years, bottoming out on July 8, 1932, having lost almost 90 percent of its value since its peak on Sept. 3, 1929.