GCTK vs ISPC: Correlation
GlucoTrack, Inc. (GCTK) and iSpecimen Inc. (ISPC) show a moderate relationship: their 3-year correlation of weekly returns is 0.38.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are GCTK and ISPC?
Over the past 3 years, GCTK and ISPC moved with a correlation of 0.38, which is moderate. Lately the two have moved closer together, with the 1-year correlation at 0.63 versus 0.38 over 3 years. Over 5 years the correlation is 0.17, and the annualized covariance of weekly returns is 7983.3 %².
By 3-year correlation, ISPC places #5 of the 10 assets tracked against GCTK. Twelve-month performance is nearly a tie, at -93.6% for GCTK and -94.6% for ISPC.
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 ISPC: side by side
| GCTK (GlucoTrack, Inc.) | ISPC (iSpecimen Inc.) | |
|---|---|---|
| 1-year return | -93.6% | -94.6% |
| 5-year return | -100.0% | -100.0% |
| Volatility (ann.) | 174.3% | 121.8% |
| Beta vs S&P 500 | 1.74 | 0.67 |
| Max drawdown (3Y) | -100.0% | -99.8% |
| 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 | ISPC |
|---|---|---|
| 2022 | -66.2% | -82.4% |
| 2023 | -81.4% | -63.6% |
| 2024 | -71.5% | -73.5% |
| 2025 | -99.1% | -90.2% |
| 2026 | -92.6% | -84.6% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are GCTK and ISPC good diversifiers for each other?
Reasonably. At 0.38, GCTK and ISPC keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between GCTK and ISPC?
The GCTK/ISPC correlation stands at 0.38 on a 3-year window (1 year: 0.63, 5 years: 0.17), computed from weekly returns as of 2026-08-27.
Is ISPC a good diversifier for GCTK?
Reasonably. At 0.38, GCTK and ISPC keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.38 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-ispc.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/gctk-vs-ispc/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: GCTK correlations · ISPC correlations
