NEPH vs RKT: Correlation
How closely do Nephros, Inc. (NEPH) and Rocket Companies, Inc. (RKT) trade together? Their weekly returns over three years give a correlation of 0.29, which is weak.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NEPH and RKT?
On 3 years of weekly data the NEPH/RKT correlation comes out at 0.29, weak. Little has changed lately, as the 1-year reading of 0.19 lands near the 3-year figure. The 5-year figure is 0.25, and annualized covariance runs at 1053.2 %².
RKT is one of the assets that tracks NEPH most closely: it ranks #3 out of the 16 assets we track against NEPH. Their recent paths diverged sharply: over the last 12 months NEPH outperformed by 27.6 percentage points (+6.4% for NEPH against -21.2% for RKT).
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 RKT: side by side
| NEPH (Nephros, Inc.) | RKT (Rocket Companies, Inc.) | |
|---|---|---|
| 1-year return | +6.4% | -21.2% |
| 5-year return | -48.4% | -7.5% |
| Volatility (ann.) | 66.5% | 55.4% |
| Beta vs S&P 500 | 0.07 | 1.02 |
| Max drawdown (3Y) | -65.2% | -50.6% |
| Market cap | – | $40.3B |
| P/E (trailing) | 25.4 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | NEPH | RKT |
|---|---|---|
| 2022 | -80.3% | -46.2% |
| 2023 | +198.3% | +106.9% |
| 2024 | -57.5% | -22.2% |
| 2025 | +232.0% | +81.7% |
| 2026 | -11.7% | -26.4% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NEPH and RKT good diversifiers for each other?
Reasonably. At 0.29, NEPH and RKT keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between NEPH and RKT?
As of 2026-08-27, the correlation of weekly returns between NEPH and RKT is 0.29 over 3 years, 0.19 over 1 year and 0.25 over 5 years.
Is RKT a good diversifier for NEPH?
Reasonably. At 0.29, NEPH and RKT keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.29 mean?
A reading of 0.29 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/neph-vs-rkt.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/neph-vs-rkt/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: NEPH correlations · RKT correlations
