COST vs RETO: Correlation
How closely do Costco (COST) and ReTo Eco-Solutions, Inc. - Class A Shares (RETO) trade together? Their weekly returns over three years give a correlation of -0.23, which is negative.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are COST and RETO?
Over the past 3 years, COST and RETO moved with a correlation of -0.23, which is negative, meaning they tend to move in opposite directions. The link has tightened recently: the 1-year correlation (0.02) runs above the 3-year figure (-0.23). Over 5 years the correlation is -0.11, and the annualized covariance of weekly returns is -1851.9 %².
Within COST's tracked universe of 33 assets, RETO comes in at #28 by 3-year correlation. Correlation aside, the last 12 months split them widely, with COST ahead by 95.3 points (-1.0% versus -96.3%). One caveat on sizing: RETO is 20.2 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.
COST vs RETO: side by side
| COST (Costco) | RETO (ReTo Eco-Solutions, Inc. - Class A Shares) | |
|---|---|---|
| 1-year return | -1.0% | -96.3% |
| 5-year return | +116.3% | -100.0% |
| Volatility (ann.) | 19.8% | 399.9% |
| Beta vs S&P 500 | 0.45 | -2.83 |
| Max drawdown (3Y) | -20.7% | -99.5% |
| Market cap | $414.5B | – |
| P/E (trailing) | 48.1 | – |
| Dividend yield | 0.56% | 0.00% |
| Sector / category | Consumer Staples | US Listed |
Year-by-year returns
| Year | COST | RETO |
|---|---|---|
| 2022 | -19.0% | -75.9% |
| 2023 | +49.0% | -99.1% |
| 2024 | +39.6% | -74.9% |
| 2025 | -5.4% | -57.1% |
| 2026 | +8.9% | -81.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are COST and RETO good diversifiers for each other?
By historical standards, yes. A correlation of -0.23 means the two rarely move for the same reasons.
FAQ
What is the correlation between COST and RETO?
The COST/RETO correlation stands at -0.23 on a 3-year window (1 year: 0.02, 5 years: -0.11), computed from weekly returns as of 2026-08-27.
Is RETO a good diversifier for COST?
By historical standards, yes. A correlation of -0.23 means the two rarely move for the same reasons.
What does a correlation of -0.23 mean?
A reading of -0.23 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/cost-vs-reto.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/cost-vs-reto/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: COST correlations · RETO correlations
