NEPH vs VTVT: Correlation
Nephros, Inc. (NEPH) and vTv Therapeutics Inc. (VTVT) show a negative relationship: their 3-year correlation of weekly returns is -0.22.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NEPH and VTVT?
Over the past 3 years, NEPH and VTVT moved with a correlation of -0.22, which is negative, meaning they tend to move in opposite directions. Recent behaviour matches the longer record: -0.25 over 1 year against -0.22 over 3. Over 5 years the correlation is -0.05, and the annualized covariance of weekly returns is -1438.0 %².
Among the 16 assets we track against NEPH, VTVT sits near the bottom by co-movement, at rank #12. Correlation aside, the last 12 months split them widely, with VTVT ahead by 95.6 points (+6.4% versus +102.0%). Note the risk asymmetry: VTVT runs 1.5 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
NEPH vs VTVT: side by side
| NEPH (Nephros, Inc.) | VTVT (vTv Therapeutics Inc.) | |
|---|---|---|
| 1-year return | +6.4% | +102.0% |
| 5-year return | -48.4% | -56.6% |
| Volatility (ann.) | 66.5% | 100.1% |
| Beta vs S&P 500 | 0.07 | 0.64 |
| Max drawdown (3Y) | -65.2% | -61.7% |
| Market cap | – | $0.1B |
| P/E (trailing) | 25.4 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | NEPH | VTVT |
|---|---|---|
| 2022 | -80.3% | -33.4% |
| 2023 | +198.3% | -56.6% |
| 2024 | -57.5% | +20.1% |
| 2025 | +232.0% | +189.6% |
| 2026 | -11.7% | -18.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NEPH and VTVT good diversifiers for each other?
Yes: at -0.22, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between NEPH and VTVT?
The NEPH/VTVT correlation stands at -0.22 on a 3-year window (1 year: -0.25, 5 years: -0.05), computed from weekly returns as of 2026-08-27.
Is VTVT a good diversifier for NEPH?
Yes: at -0.22, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.22 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/neph-vs-vtvt.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/neph-vs-vtvt/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: NEPH correlations · VTVT correlations
