What economic factors and conditions converged in the late 1920''s to plunge the nation into the Great Depression?

There were numerous economic factors and theories about the causes of the global financial recession in the late 1920s until the early 1940s known as the Great Depression. In the United State it is largely believed that a large economic bubble or over-investment followed by the stock market crash and major bank failures that led to a period of drastic decline and deflation. The loss of consumer confidence in the banking sector and in the economy as a whole had a dramatic impact on the economy for the next decade.