-7.9%
SPCX vs CMCSA
+6.3%
-14.2%
-48.8%
Performance
Returns, benchmark comparison, and relative performance.
Performance by timeframe
Returns for 10y.
| Period | Portfolio | CMCSA | Excess | Alpha |
|---|---|---|---|---|
| 1D | +0.4% | +2.4% | -1.9% | -0.2% |
| 7D | -1.0% | -5.6% | +4.5% | +0.3% |
| 30D | +11.2% | -1.9% | +13.0% | +11.2% |
| All | -7.9% | +6.3% | -14.2% | -8.9% |
Cumulative growth
Daily Returns
Daily percentage return beside CMCSA.
Daily Out/Under-Performance
Portfolio return minus CMCSA return. Positive bars indicate outperformance.
Daily Alpha
Portfolio daily return minus β × CMCSA return. Early observations use the first valid beta; later observations use the trailing beta estimated for each date.
Cumulative Out/Under-Performance
Relative wealth over 10y: compounded portfolio wealth divided by compounded CMCSA wealth, less one. Both series rebase at the selected span's start.
Cumulative Alpha
Compounded beta-adjusted residual returns apply the first valid beta to early observations, then the trailing beta ending on each date.
Updating return analytics…
10y analysis · Full analysis span regression · Available span rolling