OI vs SGI: Correlation
Measured on weekly returns over the past three years, O-I Glass, Inc. (OI) and Somnigroup International Inc. (SGI) carry a correlation of 0.55, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are OI and SGI?
On 3 years of weekly data the OI/SGI correlation comes out at 0.55, moderate. The relationship has been stable: the 1-year correlation (0.65) sits close to the 3-year figure. The 5-year figure is 0.49, and annualized covariance runs at 755.0 %².
Few assets follow OI as closely as SGI, which ranks #3 of 12 tracked partners. The last year tells two different stories: SGI led by 19.4 percentage points, -44.8% for OI against -25.4% for SGI.
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.
OI vs SGI: side by side
| OI (O-I Glass, Inc.) | SGI (Somnigroup International Inc.) | |
|---|---|---|
| 1-year return | -44.8% | -25.4% |
| 5-year return | -53.2% | +44.9% |
| Volatility (ann.) | 40.3% | 33.8% |
| Beta vs S&P 500 | 0.91 | 1.02 |
| Max drawdown (3Y) | -68.6% | -37.1% |
| Market cap | $1.1B | $13.1B |
| P/E (trailing) | – | 24.8 |
| Dividend yield | 0.00% | 1.02% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | OI | SGI |
|---|---|---|
| 2022 | +37.7% | -26.0% |
| 2023 | -1.1% | +50.1% |
| 2024 | -33.8% | +12.3% |
| 2025 | +36.2% | +58.8% |
| 2026 | -51.2% | -29.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are OI and SGI good diversifiers for each other?
Only partially. A correlation of 0.55 means OI and SGI 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 OI and SGI?
The OI/SGI correlation stands at 0.55 on a 3-year window (1 year: 0.65, 5 years: 0.49), computed from weekly returns as of 2026-08-27.
Is SGI a good diversifier for OI?
Only partially. A correlation of 0.55 means OI and SGI share most of their swings. Pairing them dampens volatility somewhat, but it will not protect against a common drawdown.
What does a correlation of 0.55 mean?
A reading of 0.55 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
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Related comparisons
Hubs: OI correlations · SGI correlations
