IDXX vs RSP: Correlation
Idexx Laboratories (IDXX) and Invesco S&P 500 Equal Weight ETF (RSP) show a moderate relationship: their 3-year correlation of weekly returns is 0.49.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IDXX and RSP?
On 3 years of weekly data the IDXX/RSP correlation comes out at 0.49, moderate. Recent behaviour matches the longer record: 0.46 over 1 year against 0.49 over 3. The 5-year figure is 0.59, and annualized covariance runs at 199.6 %².
By 3-year correlation, RSP places #12 of the 35 assets tracked against IDXX. Correlation aside, the last 12 months split them widely, with RSP ahead by 34.1 points (-14.9% versus +19.2%). Across three years, the rolling one-year figure varied moderately, from 0.38 to 0.75. One caveat on sizing: IDXX is 2.3 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.
IDXX vs RSP: side by side
| IDXX (Idexx Laboratories) | RSP (Invesco S&P 500 Equal Weight ETF) | |
|---|---|---|
| 1-year return | -14.9% | +19.2% |
| 5-year return | -20.7% | +53.9% |
| Volatility (ann.) | 30.9% | 13.2% |
| Beta vs S&P 500 | 1.01 | 0.77 |
| Max drawdown (3Y) | -37.4% | -17.8% |
| Market cap | $42.9B | – |
| P/E (trailing) | 38.9 | – |
| Dividend yield | 0.00% | 1.49% |
| Expense ratio | – | 0.20% |
| Assets under management | – | $97.3B |
| Sector / category | Health Care | 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 | IDXX | RSP |
|---|---|---|
| 2022 | -38.0% | -11.6% |
| 2023 | +36.1% | +13.7% |
| 2024 | -25.5% | +12.8% |
| 2025 | +63.6% | +11.2% |
| 2026 | -19.4% | +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 IDXX at a 0.19% weight, which makes a slice of this correlation mechanical rather than coincidental.
Are IDXX and RSP good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.49 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between IDXX and RSP?
As of 2026-08-27, the correlation of weekly returns between IDXX and RSP is 0.49 over 3 years, 0.46 over 1 year and 0.59 over 5 years.
Is RSP a good diversifier for IDXX?
Yes, to a useful degree: a correlation of 0.49 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.49 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/idxx-vs-rsp.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/idxx-vs-rsp/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: IDXX correlations · RSP correlations
