The Wall Street Crash of 1929 began with Black Thursday on October 24th, 1929 and led to a major worldwide economic depression. A bull market from the 1920s turned into a bear market as share prices collapsed over several days. On Black Thursday and the following Tuesday, some shares lost over 30% and 99% of their value respectively, causing banks to demand repayment of loans and leading to widespread business failures, unemployment, and a loss of confidence in the financial system. The global economic crisis lasted until World War 2.