What was the S and p 500 in 1929?

The S&P 500 index did not exist in 1929; it was introduced later in 1957. However, its predecessor, the S&P 90, was established in 1923 and included 90 stocks. In 1929, the Stock Market experienced significant volatility, culminating in the stock market crash in October, which was a precursor to the Great Depression. The S&P 90 was significantly affected by this crash, reflecting the economic turmoil of the time.