PII vs THRM: Correlation
Polaris Inc. (PII) and Gentherm Inc (THRM) show a moderate relationship: their 3-year correlation of weekly returns is 0.54.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are PII and THRM?
On 3 years of weekly data the PII/THRM correlation comes out at 0.54, moderate. The relationship has been stable: the 1-year correlation (0.51) sits close to the 3-year figure. The 5-year figure is 0.51, and annualized covariance runs at 765.0 %².
Within PII's tracked universe of 15 assets, THRM comes in at #8 by 3-year correlation. On 12-month performance PII holds a 7.2-point edge, +15.8% against +8.6%.
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.
PII vs THRM: side by side
| PII (Polaris Inc.) | THRM (Gentherm Inc) | |
|---|---|---|
| 1-year return | +15.8% | +8.6% |
| 5-year return | -39.0% | -54.0% |
| Volatility (ann.) | 39.0% | 36.4% |
| Beta vs S&P 500 | 1.07 | 1.04 |
| Max drawdown (3Y) | -70.4% | -61.8% |
| Market cap | $3.6B | $1.2B |
| P/E (trailing) | – | 47.0 |
| Dividend yield | 4.24% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | PII | THRM |
|---|---|---|
| 2022 | -6.0% | -24.9% |
| 2023 | -3.8% | -19.8% |
| 2024 | -37.2% | -23.8% |
| 2025 | +15.9% | -8.9% |
| 2026 | +3.1% | +11.0% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are PII and THRM good diversifiers for each other?
Only partially. A correlation of 0.54 means PII and THRM share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
FAQ
What is the correlation between PII and THRM?
As of 2026-08-27, the correlation of weekly returns between PII and THRM is 0.54 over 3 years, 0.51 over 1 year and 0.51 over 5 years.
Is THRM a good diversifier for PII?
Only partially. A correlation of 0.54 means PII and THRM share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.54 mean?
A reading of 0.54 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/pii-vs-thrm.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/pii-vs-thrm/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: PII correlations · THRM correlations
