GCTK vs PULM: Correlation
Measured on weekly returns over the past three years, GlucoTrack, Inc. (GCTK) and Pulmatrix, Inc. (PULM) carry a correlation of -0.19, a negative link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are GCTK and PULM?
Across a 3-year window, the weekly returns of GCTK and PULM correlate at -0.19, negative, meaning they tend to move in opposite directions. The past 12 months show a tighter link (0.12) than the 3-year average (-0.19). Stretching to 5 years gives -0.14, with an annualized covariance of -4710.2 %².
Out of 10 assets tracked against GCTK, PULM lands near the bottom at #8. Their recent paths diverged sharply: over the last 12 months PULM outperformed by 24.9 percentage points (-93.6% for GCTK against -68.7% for PULM).
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.
GCTK vs PULM: side by side
| GCTK (GlucoTrack, Inc.) | PULM (Pulmatrix, Inc.) | |
|---|---|---|
| 1-year return | -93.6% | -68.7% |
| 5-year return | -100.0% | -90.6% |
| Volatility (ann.) | 174.3% | 144.8% |
| Beta vs S&P 500 | 1.74 | -0.18 |
| Max drawdown (3Y) | -100.0% | -88.1% |
| Market cap | – | – |
| P/E (trailing) | 0.3 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | GCTK | PULM |
|---|---|---|
| 2022 | -66.2% | -55.7% |
| 2023 | -81.4% | -52.1% |
| 2024 | -71.5% | +275.3% |
| 2025 | -99.1% | -68.1% |
| 2026 | -92.6% | -31.8% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are GCTK and PULM good diversifiers for each other?
Yes. With a correlation of -0.19, GCTK and PULM have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between GCTK and PULM?
Using weekly returns as of 2026-08-27: -0.19 over 3 years, with 0.12 over the last year and -0.14 over 5 years.
Is PULM a good diversifier for GCTK?
Yes. With a correlation of -0.19, GCTK and PULM have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of -0.19 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/gctk-vs-pulm.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/gctk-vs-pulm/)
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Related comparisons
Hubs: GCTK correlations · PULM correlations
