HTOO vs TARA: Correlation
How closely do Fusion Fuel Green PLC (HTOO) and Protara Therapeutics, Inc. (TARA) trade together? Their weekly returns over three years give a correlation of 0.39, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are HTOO and TARA?
Over the past 3 years, HTOO and TARA moved with a correlation of 0.39, which is moderate. The past 12 months show a weaker link (-0.25) than the 3-year average (0.39). Over 5 years the correlation is 0.36, and the annualized covariance of weekly returns is 4566.5 %².
Within HTOO's tracked universe of 11 assets, TARA comes in at #5 by 3-year correlation. The last year tells two different stories: TARA led by 73.7 percentage points, -50.2% for HTOO against +23.5% for TARA.
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.
HTOO vs TARA: side by side
| HTOO (Fusion Fuel Green PLC) | TARA (Protara Therapeutics, Inc.) | |
|---|---|---|
| 1-year return | -50.2% | +23.5% |
| 5-year return | -99.5% | -49.9% |
| Volatility (ann.) | 126.6% | 93.1% |
| Beta vs S&P 500 | 0.90 | 1.19 |
| Max drawdown (3Y) | -97.7% | -66.5% |
| Market cap | – | $0.2B |
| P/E (trailing) | – | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | HTOO | TARA |
|---|---|---|
| 2022 | -46.5% | -60.3% |
| 2023 | -74.7% | -30.0% |
| 2024 | -49.7% | +181.6% |
| 2025 | -83.1% | +0.9% |
| 2026 | -39.6% | -25.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are HTOO and TARA good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.39 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between HTOO and TARA?
The HTOO/TARA correlation stands at 0.39 on a 3-year window (1 year: -0.25, 5 years: 0.36), computed from weekly returns as of 2026-08-27.
Is TARA a good diversifier for HTOO?
Yes, to a useful degree: a correlation of 0.39 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.39 mean?
On the −1 to +1 scale, 0.39 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/htoo-vs-tara.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/htoo-vs-tara/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: HTOO correlations · TARA correlations
