Compute a stock's beta coefficient from historical returns vs a market series.
Last updated: 2026-04-02
Beta measures a stock's sensitivity to market movements. A beta of 1 moves with the market; greater than 1 indicates higher volatility relative to the market.
This tool computes beta using covariance divided by market variance on paired historical returns.
Relative volatility vs the market.
More data improves stability; minimum two paired points.
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