What factors brought about the Great Depression?

The stock market crash of 1929. During the 1920s the U. S. stock market underwent a historic expansion, Banking panics and monetary contraction, The gold standard, and Decreased international lending and tariffs.

Answer: It began after the stock market crash of October 1929, which sent Wall Street into a panic and wiped out millions of investors. Over the next several years, consumer spending and investment dropped, causing steep declines in industrial output and employment as failing companies laid off workers.