From the Business Insider at ClusterStock: The Greatest Sucker's
Rally In History, Play By Play: "The early 1930 rally came after the market had fallen nearly 50% in the fall of 1929. That rally took the market up nearly 50% again, to a level that was only about 20% below the previous peak.
That rally, of course, was also the biggest sucker's rally in history. After the market peaked in April 1930, it crashed again, eventually ending up down 89% from the 1929 high and more than 80% from the 1930 high. The market did not reach the 1930 high again for another quarter of a century."
Just in case you weren't worrying.