What economic issue began after the stock market crash in 1929?

nearly half of America's banks had failed, and unemployment was approaching 15 million people, or 30 percent of the workforce.

Explanation:

The stock market crash of 1929 was not the sole cause of the Great Depression, but it did act to accelerate the global economic collapse of which it was also a symptom. By 1933, nearly half of America's banks had failed, and unemployment was approaching 15 million people, or 30 percent of the workforce.