CMCSA vs RSP: Correlation
Measured on weekly returns over the past three years, Comcast (CMCSA) and Invesco S&P 500 Equal Weight ETF (RSP) carry a correlation of 0.48, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CMCSA and RSP?
Over the past 3 years, CMCSA and RSP moved with a correlation of 0.48, which is moderate. The relationship has been stable: the 1-year correlation (0.40) sits close to the 3-year figure. Over 5 years the correlation is 0.51, and the annualized covariance of weekly returns is 150.5 %².
Among the 39 assets we track against CMCSA, RSP ranks #7 by 3-year correlation. The last year tells two different stories: RSP led by 31.8 percentage points, -12.6% for CMCSA against +19.2% for RSP. The rolling one-year correlation moved between 0.32 and 0.74 over the past three years, a moderate range. Risk is not evenly split, since CMCSA carries 1.8 times the volatility of the other side.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
CMCSA vs RSP: side by side
| CMCSA (Comcast) | RSP (Invesco S&P 500 Equal Weight ETF) | |
|---|---|---|
| 1-year return | -12.6% | +19.2% |
| 5-year return | -44.5% | +53.9% |
| Volatility (ann.) | 23.8% | 13.2% |
| Beta vs S&P 500 | 0.48 | 0.77 |
| Max drawdown (3Y) | -44.9% | -17.8% |
| Market cap | $93.7B | – |
| P/E (trailing) | 8.7 | – |
| Dividend yield | 4.85% | 1.49% |
| Expense ratio | – | 0.20% |
| Assets under management | – | $97.3B |
| Sector / category | Communication Services | ETF · US Large Cap |
On the fund side, RSP sits in the Large Blend category at Invesco, with $97.3B under management, 505 holdings, a 0.20% expense ratio, a 1.49% trailing dividend yield.
Year-by-year returns
| Year | CMCSA | RSP |
|---|---|---|
| 2022 | -28.7% | -11.6% |
| 2023 | +29.1% | +13.7% |
| 2024 | -11.8% | +12.8% |
| 2025 | -17.3% | +11.2% |
| 2026 | -2.2% | +16.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Fund exposure
A structural note: 0.21% of RSP is CMCSA itself, so the fund partly moves with the stock by construction.
Are CMCSA and RSP good diversifiers for each other?
A fair diversifier. At 0.48, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between CMCSA and RSP?
The CMCSA/RSP correlation stands at 0.48 on a 3-year window (1 year: 0.40, 5 years: 0.51), computed from weekly returns as of 2026-08-27.
Is RSP a good diversifier for CMCSA?
A fair diversifier. At 0.48, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.48 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/cmcsa-vs-rsp.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/cmcsa-vs-rsp/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CMCSA correlations · RSP correlations
