ACAD vs NEPH: Correlation
ACADIA Pharmaceuticals Inc. (ACAD) and Nephros, Inc. (NEPH) show a moderate relationship: their 3-year correlation of weekly returns is 0.32.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are ACAD and NEPH?
Over the past 3 years, ACAD and NEPH moved with a correlation of 0.32, which is moderate. Recent behaviour matches the longer record: 0.22 over 1 year against 0.32 over 3. Over 5 years the correlation is 0.23, and the annualized covariance of weekly returns is 1054.4 %².
By 3-year correlation, NEPH places #10 of the 15 assets tracked against ACAD. The trailing year gives ACAD the advantage: +11.9% versus +6.4%, a 5.5-point spread.
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.
ACAD vs NEPH: side by side
| ACAD (ACADIA Pharmaceuticals Inc.) | NEPH (Nephros, Inc.) | |
|---|---|---|
| 1-year return | +11.9% | +6.4% |
| 5-year return | +75.2% | -48.4% |
| Volatility (ann.) | 48.8% | 66.5% |
| Beta vs S&P 500 | 1.18 | 0.07 |
| Max drawdown (3Y) | -55.6% | -65.2% |
| Market cap | $5.1B | – |
| P/E (trailing) | 13.3 | 25.4 |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | ACAD | NEPH |
|---|---|---|
| 2022 | -31.8% | -80.3% |
| 2023 | +96.7% | +198.3% |
| 2024 | -41.4% | -57.5% |
| 2025 | +45.6% | +232.0% |
| 2026 | +11.3% | -11.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are ACAD and NEPH good diversifiers for each other?
Reasonably. At 0.32, ACAD and NEPH keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between ACAD and NEPH?
Using weekly returns as of 2026-08-27: 0.32 over 3 years, with 0.22 over the last year and 0.23 over 5 years.
Is NEPH a good diversifier for ACAD?
Reasonably. At 0.32, ACAD and NEPH keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.32 mean?
On the −1 to +1 scale, 0.32 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
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Related comparisons
Hubs: ACAD correlations · NEPH correlations
