ISRG vs VTI: Correlation
Intuitive Surgical (ISRG) and Vanguard Total Stock Market ETF (VTI) show a moderate relationship: their 3-year correlation of weekly returns is 0.56.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ISRG and VTI?
Over the past 3 years, ISRG and VTI moved with a correlation of 0.56, which is moderate. Lately the two have drifted apart, with the 1-year correlation at 0.39 versus 0.56 over 3 years. Over 5 years the correlation is 0.65, and the annualized covariance of weekly returns is 256.9 %².
Within ISRG's tracked universe of 36 assets, VTI comes in at #8 by 3-year correlation. Their recent paths diverged sharply: over the last 12 months VTI outperformed by 42.8 percentage points (-22.1% for ISRG against +20.7% for VTI). On a rolling one-year basis the correlation drifted between 0.28 and 0.77, a moderate band. Risk is not evenly split, since ISRG carries 2.1 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.
ISRG vs VTI: side by side
| ISRG (Intuitive Surgical) | VTI (Vanguard Total Stock Market ETF) | |
|---|---|---|
| 1-year return | -22.1% | +20.7% |
| 5-year return | +4.0% | +74.8% |
| Volatility (ann.) | 31.1% | 14.6% |
| Beta vs S&P 500 | 1.20 | 1.01 |
| Max drawdown (3Y) | -45.6% | -19.3% |
| Market cap | $131.5B | – |
| P/E (trailing) | 42.5 | – |
| 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 | ISRG | VTI |
|---|---|---|
| 2022 | -26.1% | -19.5% |
| 2023 | +27.1% | +26.0% |
| 2024 | +54.7% | +23.8% |
| 2025 | +8.5% | +17.1% |
| 2026 | -35.2% | +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 ISRG at a 0.17% weight, which makes a slice of this correlation mechanical rather than coincidental.
Are ISRG and VTI good diversifiers for each other?
Somewhat, no more. With 0.56 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between ISRG and VTI?
As of 2026-08-27, the correlation of weekly returns between ISRG and VTI is 0.56 over 3 years, 0.39 over 1 year and 0.65 over 5 years.
Is VTI a good diversifier for ISRG?
Somewhat, no more. With 0.56 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.56 mean?
A reading of 0.56 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/isrg-vs-vti.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/isrg-vs-vti/)
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Related comparisons
Hubs: ISRG correlations · VTI correlations
