AOSL vs POWI: Correlation
How closely do Alpha and Omega Semiconductor Limited (AOSL) and Power Integrations, Inc. (POWI) trade together? Their weekly returns over three years give a correlation of 0.60, which is strong.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are AOSL and POWI?
On 3 years of weekly data the AOSL/POWI correlation comes out at 0.60, strong. The past 12 months show a tighter link (0.73) than the 3-year average (0.60). The 5-year figure is 0.60, and annualized covariance runs at 1935.1 %².
In AOSL's tracked universe of 16 assets, POWI sits right near the top at #2. Their recent paths diverged sharply: over the last 12 months POWI outperformed by 31.9 percentage points (-11.4% for AOSL against +20.5% for POWI).
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.
AOSL vs POWI: side by side
| AOSL (Alpha and Omega Semiconductor Limited) | POWI (Power Integrations, Inc.) | |
|---|---|---|
| 1-year return | -11.4% | +20.5% |
| 5-year return | -9.2% | -46.7% |
| Volatility (ann.) | 69.3% | 46.5% |
| Beta vs S&P 500 | 2.34 | 1.59 |
| Max drawdown (3Y) | -66.9% | -63.6% |
| Market cap | $0.8B | $3.1B |
| P/E (trailing) | – | 125.7 |
| Dividend yield | 0.00% | 1.55% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | AOSL | POWI |
|---|---|---|
| 2022 | -52.8% | -22.1% |
| 2023 | -8.8% | +15.6% |
| 2024 | +42.1% | -24.0% |
| 2025 | -46.5% | -41.3% |
| 2026 | +32.4% | +56.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are AOSL and POWI good diversifiers for each other?
To a limited degree. At 0.60 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between AOSL and POWI?
As of 2026-08-27, the correlation of weekly returns between AOSL and POWI is 0.60 over 3 years, 0.73 over 1 year and 0.60 over 5 years.
Is POWI a good diversifier for AOSL?
To a limited degree. At 0.60 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.60 mean?
On the −1 to +1 scale, 0.60 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/aosl-vs-powi.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/aosl-vs-powi/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: AOSL correlations · POWI correlations
