IDXX vs VTI: Correlation
Measured on weekly returns over the past three years, Idexx Laboratories (IDXX) and Vanguard Total Stock Market ETF (VTI) 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 IDXX and VTI?
On 3 years of weekly data the IDXX/VTI correlation comes out at 0.48, moderate. The past 12 months show a weaker link (0.32) than the 3-year average (0.48). The 5-year figure is 0.60, and annualized covariance runs at 217.9 %².
By 3-year correlation, VTI places #13 of the 35 assets tracked against IDXX. Correlation aside, the last 12 months split them widely, with VTI ahead by 35.6 points (-14.9% versus +20.7%). On a rolling one-year basis the correlation drifted between 0.35 and 0.76, a moderate band. Note the risk asymmetry: IDXX runs 2.1 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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 VTI: side by side
| IDXX (Idexx Laboratories) | VTI (Vanguard Total Stock Market ETF) | |
|---|---|---|
| 1-year return | -14.9% | +20.7% |
| 5-year return | -20.7% | +74.8% |
| Volatility (ann.) | 30.9% | 14.6% |
| Beta vs S&P 500 | 1.01 | 1.01 |
| Max drawdown (3Y) | -37.4% | -19.3% |
| Market cap | $42.9B | – |
| P/E (trailing) | 38.9 | – |
| Dividend yield | 0.00% | 1.06% |
| Expense ratio | – | 0.03% |
| Assets under management | – | $2,290.0B |
| Sector / category | Health Care | ETF · US Large Cap |
VTI, Vanguard's Large Blend fund, carries $2,290.0B under management, 3140 holdings, a 0.03% expense ratio, a 1.06% trailing dividend yield.
Year-by-year returns
| Year | IDXX | VTI |
|---|---|---|
| 2022 | -38.0% | -19.5% |
| 2023 | +36.1% | +26.0% |
| 2024 | -25.5% | +23.8% |
| 2025 | +63.6% | +17.1% |
| 2026 | -19.4% | +14.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Fund exposure
Keep in mind that VTI holds IDXX at a 0.06% weight, which makes a slice of this correlation mechanical rather than coincidental.
Are IDXX and VTI 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 IDXX and VTI?
As of 2026-08-27, the correlation of weekly returns between IDXX and VTI is 0.48 over 3 years, 0.32 over 1 year and 0.60 over 5 years.
Is VTI a good diversifier for IDXX?
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?
A reading of 0.48 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/idxx-vs-vti.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/idxx-vs-vti/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: IDXX correlations · VTI correlations
