SIF vs SPY: Correlation
How closely do SIFCO Industries, Inc. (SIF) and SPDR S&P 500 ETF Trust (SPY) trade together? Their weekly returns over three years give a correlation of 0.15, which is weak.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are SIF and SPY?
Across a 3-year window, the weekly returns of SIF and SPY correlate at 0.15, weak. Lately the two have drifted apart, with the 1-year correlation at 0.03 versus 0.15 over 3 years. Stretching to 5 years gives 0.15, with an annualized covariance of 167.1 %².
Among the 10 assets we track against SIF, SPY sits near the bottom by co-movement, at rank #7. Correlation aside, the last 12 months split them widely, with SIF ahead by 211.6 points (+232.2% versus +20.6%). One caveat on sizing: SIF is 5.3 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.
SIF vs SPY: side by side
| SIF (SIFCO Industries, Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +232.2% | +20.6% |
| 5-year return | +174.7% | +82.4% |
| Volatility (ann.) | 76.9% | 14.5% |
| Beta vs S&P 500 | 0.80 | 1.00 |
| Max drawdown (3Y) | -57.3% | -18.8% |
| Market cap | – | – |
| P/E (trailing) | 35.5 | – |
| Dividend yield | 0.00% | 1.01% |
| Expense ratio | – | 0.09% |
| Assets under management | – | $795.3B |
| Sector / category | US Listed | ETF · US Large Cap |
SPY is a Large Blend fund from State Street Investment Management: $795.3B under management, 504 holdings, a 0.09% expense ratio, a 1.01% trailing dividend yield.
Year-by-year returns
| Year | SIF | SPY |
|---|---|---|
| 2022 | -66.8% | -18.2% |
| 2023 | +110.2% | +26.2% |
| 2024 | -21.8% | +24.9% |
| 2025 | +57.2% | +17.7% |
| 2026 | +300.7% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are SIF and SPY good diversifiers for each other?
Yes. With a correlation of 0.15, SIF and SPY have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between SIF and SPY?
The SIF/SPY correlation stands at 0.15 on a 3-year window (1 year: 0.03, 5 years: 0.15), computed from weekly returns as of 2026-08-27.
Is SPY a good diversifier for SIF?
Yes. With a correlation of 0.15, SIF and SPY have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of 0.15 mean?
On the −1 to +1 scale, 0.15 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/sif-vs-spy.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/sif-vs-spy/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: SIF correlations · SPY correlations
