What caused black Tuesday?
There was over speculation in the Stock Market, which was not regulated, during the 1920s..Many Americans purchased stock on credit. This was known as margin buying. Politicians did not understand the problems facing the economy so they took no action to regulate the purchase and sale of stocks. As people continued to purchase stock, the value of the shares bore little relationship to the actual health of the industry issuing the stock or the over-all health of the American economy. On September 3, 1929, the average price of shares on the New York Stock exchange peaked and then dipped sharply. For a month, prices spurted up and down, mostly down. Then on "Black Thursday," October 24, a record 13 million shares changed hands and values collapsed. The following "Black Tuesday,", October 29, the drop of shares was worse. 16 million shares of stock were dumped on the market (put up for sale). But there were no buyers. The Stock Market collapsed.