ATYR vs AVIR: Correlation
How closely do aTyr Pharma, Inc. (ATYR) and Atea Pharmaceuticals, Inc. (AVIR) trade together? Their weekly returns over three years give a correlation of 0.39, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ATYR and AVIR?
On 3 years of weekly data the ATYR/AVIR correlation comes out at 0.39, moderate. Recent behaviour matches the longer record: 0.40 over 1 year against 0.39 over 3. The 5-year figure is 0.18, and annualized covariance runs at 1757.2 %².
AVIR is one of the assets that tracks ATYR most closely: it ranks #2 out of the 10 assets we track against ATYR. The last year tells two different stories: AVIR led by 140.7 percentage points, -89.3% for ATYR against +51.4% for AVIR. One caveat on sizing: ATYR is 2.0 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.
ATYR vs AVIR: side by side
| ATYR (aTyr Pharma, Inc.) | AVIR (Atea Pharmaceuticals, Inc.) | |
|---|---|---|
| 1-year return | -89.3% | +51.4% |
| 5-year return | -89.9% | -82.1% |
| Volatility (ann.) | 94.3% | 48.3% |
| Beta vs S&P 500 | 1.25 | 0.73 |
| Max drawdown (3Y) | -94.0% | -44.1% |
| Market cap | $0.1B | $0.4B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ATYR | AVIR |
|---|---|---|
| 2022 | -70.7% | -46.2% |
| 2023 | -35.6% | -36.6% |
| 2024 | +156.7% | +9.8% |
| 2025 | -78.4% | +6.6% |
| 2026 | -29.2% | +52.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ATYR and AVIR good diversifiers for each other?
A fair diversifier. At 0.39, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between ATYR and AVIR?
Using weekly returns as of 2026-08-27: 0.39 over 3 years, with 0.40 over the last year and 0.18 over 5 years.
Is AVIR a good diversifier for ATYR?
A fair diversifier. At 0.39, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.39 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.
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Related comparisons
Hubs: ATYR correlations · AVIR correlations
