AUPH vs HTOO: Correlation
Measured on weekly returns over the past three years, Aurinia Pharmaceuticals Inc (AUPH) and Fusion Fuel Green PLC (HTOO) carry a correlation of -0.27, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AUPH and HTOO?
Over the past 3 years, AUPH and HTOO moved with a correlation of -0.27, which is negative, meaning they tend to move in opposite directions. The relationship has been stable: the 1-year correlation (-0.20) sits close to the 3-year figure. Over 5 years the correlation is -0.06, and the annualized covariance of weekly returns is -1407.7 %².
HTOO is close to the least connected end of AUPH's tracked universe, ranking #17 of 20. Their recent paths diverged sharply: over the last 12 months AUPH outperformed by 86.2 percentage points (+36.0% for AUPH against -50.2% for HTOO). One caveat on sizing: HTOO is 3.0 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.
AUPH vs HTOO: side by side
| AUPH (Aurinia Pharmaceuticals Inc) | HTOO (Fusion Fuel Green PLC) | |
|---|---|---|
| 1-year return | +36.0% | -50.2% |
| 5-year return | -3.2% | -99.5% |
| Volatility (ann.) | 41.8% | 126.6% |
| Beta vs S&P 500 | 0.59 | 0.90 |
| Max drawdown (3Y) | -52.8% | -97.7% |
| Market cap | $2.2B | – |
| P/E (trailing) | 7.3 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | AUPH | HTOO |
|---|---|---|
| 2022 | -81.1% | -46.5% |
| 2023 | +108.1% | -74.7% |
| 2024 | -0.1% | -49.7% |
| 2025 | +77.6% | -83.1% |
| 2026 | +3.3% | -39.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AUPH and HTOO good diversifiers for each other?
Yes. With a correlation of -0.27, AUPH and HTOO have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between AUPH and HTOO?
Using weekly returns as of 2026-08-27: -0.27 over 3 years, with -0.20 over the last year and -0.06 over 5 years.
Is HTOO a good diversifier for AUPH?
Yes. With a correlation of -0.27, AUPH and HTOO have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.27 mean?
A reading of -0.27 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/auph-vs-htoo.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/auph-vs-htoo/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: AUPH correlations · HTOO correlations
