AMPH vs KWR: Correlation
Amphastar Pharmaceuticals, Inc. (AMPH) and Quaker Houghton (KWR) show a moderate relationship: their 3-year correlation of weekly returns is 0.46.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AMPH and KWR?
Across a 3-year window, the weekly returns of AMPH and KWR correlate at 0.46, moderate. Little has changed lately, as the 1-year reading of 0.55 lands near the 3-year figure. Stretching to 5 years gives 0.24, with an annualized covariance of 700.6 %².
In AMPH's tracked universe of 13 assets, KWR sits right near the top at #3. Their recent paths diverged sharply: over the last 12 months KWR outperformed by 43.3 percentage points (-28.2% for AMPH against +15.1% for KWR).
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.
AMPH vs KWR: side by side
| AMPH (Amphastar Pharmaceuticals, Inc.) | KWR (Quaker Houghton) | |
|---|---|---|
| 1-year return | -28.2% | +15.1% |
| 5-year return | +12.9% | -32.5% |
| Volatility (ann.) | 44.1% | 34.3% |
| Beta vs S&P 500 | 0.67 | 1.16 |
| Max drawdown (3Y) | -73.4% | -55.3% |
| Market cap | $0.9B | $2.8B |
| P/E (trailing) | 13.0 | 29.4 |
| Dividend yield | 0.00% | 1.24% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | AMPH | KWR |
|---|---|---|
| 2022 | +20.3% | -26.9% |
| 2023 | +120.7% | +29.1% |
| 2024 | -40.0% | -33.4% |
| 2025 | -27.9% | -0.8% |
| 2026 | -18.3% | +20.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AMPH and KWR good diversifiers for each other?
Reasonably. At 0.46, AMPH and KWR keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between AMPH and KWR?
Using weekly returns as of 2026-08-27: 0.46 over 3 years, with 0.55 over the last year and 0.24 over 5 years.
Is KWR a good diversifier for AMPH?
Reasonably. At 0.46, AMPH and KWR keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.46 mean?
On the −1 to +1 scale, 0.46 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
$ curl https://www.pairbook.io/api/v1/pairs/amph-vs-kwr.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/amph-vs-kwr/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: AMPH correlations · KWR correlations
