What Is the S&P 500 and What Does It Actually Measure?

By Drift Striker · February 27, 2026
What Is the S&P 500 and What Does It Actually Measure?

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The S&P 500 isn’t just a number on a screen that traders watch while sipping morning coffee. It’s the closest thing Wall Street has to a pulse check on American capitalism — a single figure that moves markets, shapes retirement accounts, and gets quoted in news broadcasts as if it were the temperature outside. Understanding […]