CNM vs ISPC: Correlation
Measured on weekly returns over the past three years, Core & Main, Inc. (CNM) and iSpecimen Inc. (ISPC) carry a correlation of -0.23, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are CNM and ISPC?
On 3 years of weekly data the CNM/ISPC correlation comes out at -0.23, negative, meaning they tend to move in opposite directions. Lately the two have drifted apart, with the 1-year correlation at -0.43 versus -0.23 over 3 years. The 5-year figure is -0.06, and annualized covariance runs at -1105.2 %².
By 3-year correlation, ISPC places #11 of the 17 assets tracked against CNM. Correlation aside, the last 12 months split them widely, with CNM ahead by 61.1 points (-33.5% versus -94.6%). One caveat on sizing: ISPC is 3.1 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.
CNM vs ISPC: side by side
| CNM (Core & Main, Inc.) | ISPC (iSpecimen Inc.) | |
|---|---|---|
| 1-year return | -33.5% | -94.6% |
| 5-year return | +63.1% | -100.0% |
| Volatility (ann.) | 39.7% | 121.8% |
| Beta vs S&P 500 | 1.19 | 0.67 |
| Max drawdown (3Y) | -38.7% | -99.8% |
| Market cap | $8.5B | – |
| P/E (trailing) | 18.4 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | CNM | ISPC |
|---|---|---|
| 2022 | -36.4% | -82.4% |
| 2023 | +109.3% | -63.6% |
| 2024 | +26.0% | -73.5% |
| 2025 | +2.1% | -90.2% |
| 2026 | -15.8% | -84.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are CNM and ISPC good diversifiers for each other?
Yes: at -0.23, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between CNM and ISPC?
The CNM/ISPC correlation stands at -0.23 on a 3-year window (1 year: -0.43, 5 years: -0.06), computed from weekly returns as of 2026-08-27.
Is ISPC a good diversifier for CNM?
Yes: at -0.23, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.23 mean?
On the −1 to +1 scale, -0.23 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/cnm-vs-ispc.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/cnm-vs-ispc/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: CNM correlations · ISPC correlations
