COST vs KO: Correlation
How closely do Costco (COST) and Coca-Cola Company (The) (KO) trade together? Their weekly returns over three years give a correlation of 0.30, which is moderate.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are COST and KO?
On 3 years of weekly data the COST/KO correlation comes out at 0.30, moderate. Lately the two have moved closer together, with the 1-year correlation at 0.42 versus 0.30 over 3 years. The 5-year figure is 0.40, and annualized covariance runs at 90.3 %².
By 3-year correlation, KO places #20 of the 33 assets tracked against COST. Their recent paths diverged sharply: over the last 12 months KO outperformed by 34.1 percentage points (-1.0% for COST against +33.1% for KO). The rolling one-year correlation moved between 0.02 and 0.49 over the past three years, a moderate range.
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 KO: side by side
| COST (Costco) | KO (Coca-Cola Company (The)) | |
|---|---|---|
| 1-year return | -1.0% | +33.1% |
| 5-year return | +116.3% | +83.8% |
| Volatility (ann.) | 19.8% | 15.4% |
| Beta vs S&P 500 | 0.45 | 0.11 |
| Max drawdown (3Y) | -20.7% | -15.5% |
| Market cap | $414.5B | $383.2B |
| P/E (trailing) | 48.1 | 27.0 |
| Dividend yield | 0.56% | 2.31% |
| Sector / category | Consumer Staples | Consumer Staples |
Year-by-year returns
| Year | COST | KO |
|---|---|---|
| 2022 | -19.0% | +10.6% |
| 2023 | +49.0% | -4.4% |
| 2024 | +39.6% | +8.9% |
| 2025 | -5.4% | +15.6% |
| 2026 | +8.9% | +29.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are COST and KO good diversifiers for each other?
Reasonably. At 0.30, COST and KO keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between COST and KO?
The COST/KO correlation stands at 0.30 on a 3-year window (1 year: 0.42, 5 years: 0.40), computed from weekly returns as of 2026-08-27.
Is KO a good diversifier for COST?
Reasonably. At 0.30, COST and KO keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.30 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/cost-vs-ko.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/cost-vs-ko/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: COST correlations · KO correlations
