This Day in Market History: The S&P 500 Index Launches

This Day in Market History: The S&P 500 Index Launches
The New York Stock Exchange (NYSE) in New York, on Feb. 24, 2022. Caitlin Ochs/Reuters
Benzinga
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Each day, Benzinga takes a look back at a notable market-related moment that occurred on this date.

What Happened

On March 4, 1957, the Standard & Poors launched the S&P 500 index.

Where the Market Was

The Dow closed at 471.48 and the S&P 500 traded at 44.06.

What Else Was Going On in the World

In 1957, the Soviet Union launched Sputnik 1, the first ever space satellite. Toy company Wham-O released the Frisbee in the U.S. market. The average price of a new car was $2,749.

S&P 500 Born

S&P launched its first stock index way back in 1923, but its S&P 500 index launched in 1957 has become the gold standard of U.S. stock indices. The S&P 500 is an index comprised of the largest 500 U.S. equities, and it’s calculated based on a free-floating market-cap-weighted formula.

“I would say it’s the primary index,” TD Ameritrade chief market strategist J.J. Kinahan told Benzinga. “It’s an amazing advancement because although the Dow at its time was revolutionary, it’s only 30 stocks and it’s price weighted.”