COHR vs VTI: Correlation
How closely do Coherent Corp. (COHR) and Vanguard Total Stock Market ETF (VTI) trade together? Their weekly returns over three years give a correlation of 0.63, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are COHR and VTI?
Across a 3-year window, the weekly returns of COHR and VTI correlate at 0.63, strong. The past 12 months show a weaker link (0.44) than the 3-year average (0.63). Stretching to 5 years gives 0.59, with an annualized covariance of 595.8 %².
By 3-year correlation, VTI places #6 of the 41 assets tracked against COHR. Their recent paths diverged sharply: over the last 12 months COHR outperformed by 204.9 percentage points (+225.6% for COHR against +20.7% for VTI). This link changes with the market regime, having swung between 0.29 and 0.83 on a rolling one-year basis. One caveat on sizing: COHR is 4.5 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.
COHR vs VTI: side by side
| COHR (Coherent Corp.) | VTI (Vanguard Total Stock Market ETF) | |
|---|---|---|
| 1-year return | +225.6% | +20.7% |
| 5-year return | +368.6% | +74.8% |
| Volatility (ann.) | 65.0% | 14.6% |
| Beta vs S&P 500 | 2.76 | 1.01 |
| Max drawdown (3Y) | -54.8% | -19.3% |
| Market cap | $57.8B | – |
| P/E (trailing) | 71.4 | – |
| Dividend yield | 0.00% | 1.06% |
| Expense ratio | – | 0.03% |
| Assets under management | – | $2,290.0B |
| Sector / category | Information Technology | 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 | COHR | VTI |
|---|---|---|
| 2022 | -48.6% | -19.5% |
| 2023 | +24.0% | +26.0% |
| 2024 | +117.6% | +23.8% |
| 2025 | +94.8% | +17.1% |
| 2026 | +60.0% | +14.2% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Fund exposure
COHR represents 0.07% of VTI's portfolio, so part of any move in VTI is COHR itself, and the correlation between them is partly mechanical.
Are COHR and VTI good diversifiers for each other?
To a limited degree. At 0.63 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 COHR and VTI?
As of 2026-08-27, the correlation of weekly returns between COHR and VTI is 0.63 over 3 years, 0.44 over 1 year and 0.59 over 5 years.
Is VTI a good diversifier for COHR?
To a limited degree. At 0.63 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 0.63 mean?
A reading of 0.63 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/cohr-vs-vti.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/cohr-vs-vti/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: COHR correlations · VTI correlations
