correlation — how two names move together
Return correlation between two names
The return correlation of AAPL and MSFT from ~2 years of real daily returns — how tightly the two move together. A low or negative correlation means they diversify each other; a high one means they rise and fall as one. Real-only; a name is 1.00 correlated with itself.
AAPLvsMSFT
+0.31
correlation over 493 trading days
95% CI +0.23 … +0.39 · n 493
Moderately coupled.
Pearson r +0.31493 shared daily log-returns (~2y)Fisher 95% CI +0.23 … +0.39
Recent (63d)
+0.16
R²
0.10
β of AAPL on MSFT
0.32
Pearson correlation of daily log-returns over ~2 years (and a recent 63-day window — one short window, so expect it to move around the full-window figure). R² is the share of AAPL's moves explained by MSFT; β on MSFT is how AAPL has moved per 1 move in MSFT. Correlation runs from −1 to +1 — negative (green) means the two have moved opposite over this window, and correlations tend to rise toward 1 in a sell-off. Your decisions, your risk.