BLK vs RSP: Correlation
Measured on weekly returns over the past three years, BlackRock (BLK) and Invesco S&P 500 Equal Weight ETF (RSP) carry a correlation of 0.72, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BLK and RSP?
On 3 years of weekly data the BLK/RSP correlation comes out at 0.72, strong. The link has loosened recently: the 1-year correlation (0.48) runs below the 3-year figure (0.72). The 5-year figure is 0.78, and annualized covariance runs at 234.1 %².
RSP is one of the assets that tracks BLK most closely: it ranks #1 out of the 42 assets we track against BLK. Over the last 12 months RSP came out ahead by 13.9 percentage points (+5.3% against +19.2%). The rolling one-year correlation moved between 0.47 and 0.88 over the past three years, a moderate range. One caveat on sizing: BLK is 1.9 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
BLK vs RSP: side by side
| BLK (BlackRock) | RSP (Invesco S&P 500 Equal Weight ETF) | |
|---|---|---|
| 1-year return | +5.3% | +19.2% |
| 5-year return | +38.9% | +53.9% |
| Volatility (ann.) | 24.7% | 13.2% |
| Beta vs S&P 500 | 1.19 | 0.77 |
| Max drawdown (3Y) | -23.7% | -17.8% |
| Market cap | $189.7B | – |
| P/E (trailing) | 28.1 | – |
| Dividend yield | 1.86% | 1.49% |
| Expense ratio | – | 0.20% |
| Assets under management | – | $97.3B |
| Sector / category | Financials | 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 | BLK | RSP |
|---|---|---|
| 2022 | -20.4% | -11.6% |
| 2023 | +17.9% | +13.7% |
| 2024 | +29.3% | +12.8% |
| 2025 | +6.6% | +11.2% |
| 2026 | +10.3% | +16.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Fund exposure
Keep in mind that RSP holds BLK at a 0.22% weight, which makes a slice of this correlation mechanical rather than coincidental.
Are BLK and RSP good diversifiers for each other?
To a limited degree. At 0.72 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between BLK and RSP?
Using weekly returns as of 2026-08-27: 0.72 over 3 years, with 0.48 over the last year and 0.78 over 5 years.
Is RSP a good diversifier for BLK?
To a limited degree. At 0.72 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.72 mean?
On the −1 to +1 scale, 0.72 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/blk-vs-rsp.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/blk-vs-rsp/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: BLK correlations · RSP correlations
