correlation — daily-return correlation of two names
Return correlation between two names
The return correlation of AAPL and MSFT: Pearson correlation of daily log-returns over approximately two years, with a 63-day recent window, R² and the beta of AAPL on MSFT. Computed only where price history exists for both names.
AAPLvsMSFT
+0.30
correlation over 500 trading days
95% CI +0.22 … +0.38 · n 500
Moderate correlation (r 0.3 to 0.7).
Pearson r +0.30500 shared daily log-returns (~2y)Fisher 95% CI +0.22 … +0.38
Recent (63d)
-0.04
R²
0.09
β of AAPL on MSFT
0.30
Pearson correlation of daily log-returns over ~2 years and a recent 63-day window; the 63-day figure is a short window and varies more than the full-window figure. R² is the share of AAPL's moves explained by MSFT; β on MSFT is the slope of AAPL's daily returns regressed on MSFT's. Negative values are shown in green. Correlations typically rise toward 1 in a sell-off. Research — your decisions, your risk.