COLL vs REBN: Correlation
Measured on weekly returns over the past three years, Collegium Pharmaceutical, Inc. (COLL) and Reborn Coffee, Inc. (REBN) carry a correlation of -0.20, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are COLL and REBN?
Across a 3-year window, the weekly returns of COLL and REBN correlate at -0.20, negative, meaning they tend to move in opposite directions. Little has changed lately, as the 1-year reading of -0.11 lands near the 3-year figure. Stretching to 5 years gives -0.19, with an annualized covariance of -1247.7 %².
Among the 15 assets we track against COLL, REBN sits near the bottom by co-movement, at rank #11. Their recent paths diverged sharply: over the last 12 months COLL outperformed by 21.0 percentage points (-31.8% for COLL against -52.8% for REBN). Note the risk asymmetry: REBN runs 4.3 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
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.
COLL vs REBN: side by side
| COLL (Collegium Pharmaceutical, Inc.) | REBN (Reborn Coffee, Inc.) | |
|---|---|---|
| 1-year return | -31.8% | -52.8% |
| 5-year return | +30.2% | n/a |
| Volatility (ann.) | 38.1% | 162.3% |
| Beta vs S&P 500 | 0.41 | 1.65 |
| Max drawdown (3Y) | -48.4% | -87.3% |
| Market cap | $0.8B | – |
| P/E (trailing) | 20.8 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | COLL | REBN |
|---|---|---|
| 2022 | +24.2% | – |
| 2023 | +32.7% | -30.5% |
| 2024 | -6.9% | -63.6% |
| 2025 | +61.6% | -10.2% |
| 2026 | -42.9% | -10.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are COLL and REBN good diversifiers for each other?
Yes: at -0.20, the two have gone their own ways historically, which is what genuine diversification looks like.
FAQ
What is the correlation between COLL and REBN?
The COLL/REBN correlation stands at -0.20 on a 3-year window (1 year: -0.11, 5 years: -0.19), computed from weekly returns as of 2026-08-27.
Is REBN a good diversifier for COLL?
Yes: at -0.20, the two have gone their own ways historically, which is what genuine diversification looks like.
What does a correlation of -0.20 mean?
On the −1 to +1 scale, -0.20 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/coll-vs-rebn.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/coll-vs-rebn/)
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Hubs: COLL correlations · REBN correlations
