RSP vs WEX: Correlation
How closely do Invesco S&P 500 Equal Weight ETF (RSP) and WEX Inc. (WEX) trade together? Their weekly returns over three years give a correlation of 0.54, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are RSP and WEX?
On 3 years of weekly data the RSP/WEX correlation comes out at 0.54, moderate. Lately the two have drifted apart, with the 1-year correlation at 0.29 versus 0.54 over 3 years. The 5-year figure is 0.59, and annualized covariance runs at 254.0 %².
By 3-year correlation, WEX places #168 of the 250 assets tracked against RSP. Their 12-month results are close: +19.2% for RSP against +14.7% for WEX. Risk is not evenly split, since WEX carries 2.7 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.
RSP vs WEX: side by side
| RSP (Invesco S&P 500 Equal Weight ETF) | WEX (WEX Inc.) | |
|---|---|---|
| 1-year return | +19.2% | +14.7% |
| 5-year return | +53.9% | +8.4% |
| Volatility (ann.) | 13.2% | 35.5% |
| Beta vs S&P 500 | 0.77 | 0.97 |
| Max drawdown (3Y) | -17.8% | -53.2% |
| Market cap | – | $6.8B |
| P/E (trailing) | – | 19.8 |
| Dividend yield | 1.49% | 0.00% |
| Expense ratio | 0.20% | – |
| Assets under management | $97.3B | – |
| Sector / category | ETF · US Large Cap | US Listed |
RSP, Invesco's Large Blend fund, carries $97.3B under management, 505 holdings, a 0.20% expense ratio, a 1.49% trailing dividend yield.
Year-by-year returns
| Year | RSP | WEX |
|---|---|---|
| 2022 | -11.6% | +16.6% |
| 2023 | +13.7% | +18.9% |
| 2024 | +12.8% | -9.9% |
| 2025 | +11.2% | -15.0% |
| 2026 | +16.5% | +33.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are RSP and WEX good diversifiers for each other?
Somewhat, no more. With 0.54 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between RSP and WEX?
As of 2026-08-27, the correlation of weekly returns between RSP and WEX is 0.54 over 3 years, 0.29 over 1 year and 0.59 over 5 years.
Is WEX a good diversifier for RSP?
Somewhat, no more. With 0.54 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.54 mean?
A reading of 0.54 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/rsp-vs-wex.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/rsp-vs-wex/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: RSP correlations · WEX correlations
