ISRG vs VOO: Correlation
Measured on weekly returns over the past three years, Intuitive Surgical (ISRG) and Vanguard S&P 500 ETF (VOO) carry a correlation of 0.56, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ISRG and VOO?
Over the past 3 years, ISRG and VOO moved with a correlation of 0.56, which is moderate. The past 12 months show a weaker link (0.38) than the 3-year average (0.56). Over 5 years the correlation is 0.65, and the annualized covariance of weekly returns is 250.2 %².
By 3-year correlation, VOO places #7 of the 36 assets tracked against ISRG. Their recent paths diverged sharply: over the last 12 months VOO outperformed by 42.7 percentage points (-22.1% for ISRG against +20.6% for VOO). The rolling one-year correlation moved between 0.28 and 0.77 over the past three years, a moderate range. Risk is not evenly split, since ISRG carries 2.2 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 VOO: side by side
| ISRG (Intuitive Surgical) | VOO (Vanguard S&P 500 ETF) | |
|---|---|---|
| 1-year return | -22.1% | +20.6% |
| 5-year return | +4.0% | +83.0% |
| Volatility (ann.) | 31.1% | 14.4% |
| Beta vs S&P 500 | 1.20 | 0.99 |
| Max drawdown (3Y) | -45.6% | -18.7% |
| Market cap | $131.5B | – |
| P/E (trailing) | 42.5 | – |
| Dividend yield | 0.00% | 1.07% |
| Expense ratio | – | 0.03% |
| Assets under management | – | $1,686.9B |
| Sector / category | Health Care | ETF · US Large Cap |
VOO, Vanguard's Large Blend fund, carries $1,686.9B under management, 503 holdings, a 0.03% expense ratio, a 1.07% trailing dividend yield.
Year-by-year returns
| Year | ISRG | VOO |
|---|---|---|
| 2022 | -26.1% | -18.2% |
| 2023 | +27.1% | +26.3% |
| 2024 | +54.7% | +25.0% |
| 2025 | +8.5% | +17.8% |
| 2026 | -35.2% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Fund exposure
A structural note: 0.19% of VOO is ISRG itself, so the fund partly moves with the stock by construction.
Are ISRG and VOO good diversifiers for each other?
To a limited degree. At 0.56 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 ISRG and VOO?
The ISRG/VOO correlation stands at 0.56 on a 3-year window (1 year: 0.38, 5 years: 0.65), computed from weekly returns as of 2026-08-27.
Is VOO a good diversifier for ISRG?
To a limited degree. At 0.56 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 0.56 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
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Related comparisons
Hubs: ISRG correlations · VOO correlations
