What caused the stock market crash of october 1929

In short, excessive speculation.

During the 1920s, the United States economy saw a period of massive growth and everybody wanted in. So, many people overleveraged themselves and got into financial speculation. People did well for a while but the music eventually stopped as the market hit limits and the house of cards came tumbling down as many people didn't have the money to back their bets.

answer; i believe the correct answer is (favorable balance);

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