ALEC vs SNDX: Correlation
Alector, Inc. (ALEC) and Syndax Pharmaceuticals, Inc. (SNDX) show a moderate relationship: their 3-year correlation of weekly returns is 0.49.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ALEC and SNDX?
On 3 years of weekly data the ALEC/SNDX correlation comes out at 0.49, moderate. Lately the two have drifted apart, with the 1-year correlation at 0.21 versus 0.49 over 3 years. The 5-year figure is 0.45, and annualized covariance runs at 2568.0 %².
By 3-year correlation, SNDX places #4 of the 11 assets tracked against ALEC. The last year tells two different stories: SNDX led by 24.4 percentage points, -0.4% for ALEC against +24.0% for SNDX. One caveat on sizing: ALEC is 1.6 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.
ALEC vs SNDX: side by side
| ALEC (Alector, Inc.) | SNDX (Syndax Pharmaceuticals, Inc.) | |
|---|---|---|
| 1-year return | -0.4% | +24.0% |
| 5-year return | -90.9% | +16.9% |
| Volatility (ann.) | 90.5% | 57.8% |
| Beta vs S&P 500 | 2.06 | 1.25 |
| Max drawdown (3Y) | -89.2% | -64.8% |
| Market cap | $0.3B | $1.8B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ALEC | SNDX |
|---|---|---|
| 2022 | -55.3% | +16.3% |
| 2023 | -13.5% | -15.1% |
| 2024 | -76.3% | -38.8% |
| 2025 | -17.5% | +58.9% |
| 2026 | +53.2% | -4.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ALEC and SNDX good diversifiers for each other?
A fair diversifier. At 0.49, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between ALEC and SNDX?
The ALEC/SNDX correlation stands at 0.49 on a 3-year window (1 year: 0.21, 5 years: 0.45), computed from weekly returns as of 2026-08-27.
Is SNDX a good diversifier for ALEC?
A fair diversifier. At 0.49, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.49 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
$ curl https://www.pairbook.io/api/v1/pairs/alec-vs-sndx.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/alec-vs-sndx/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: ALEC correlations · SNDX correlations
