answer:
The fundamental cause of the 1929 Wall Street crash was the indefinite period of speculation that preceded it, during which millions of individuals deposited their savings or loaned money to buy stocks, driving prices to unsustainable heights.
In the United States, where the Depression was considered the worst, manufacturing production plummeted by over 47 percent between 1929 and 1933, GDP fell by 30 percent, and unemployment reached more than 20 percent.
The crash contributed to the 1930s depression, and the downturn contributed to the extension of the era of low stock prices, "proving" to many that the prices were too high. In 1929, it was customary to blame speculators for the "boom."
Low wages, debt multiplication, a faltering agricultural sector, and an excess of huge bank loans that could not be liquidated were some of the reasons of the 1929 stock market crash.