GCTK vs SPY: Correlation
Measured on weekly returns over the past three years, GlucoTrack, Inc. (GCTK) and SPDR S&P 500 ETF Trust (SPY) carry a correlation of 0.14, a weak link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are GCTK and SPY?
Across a 3-year window, the weekly returns of GCTK and SPY correlate at 0.14, weak. Little has changed lately, as the 1-year reading of 0.19 lands near the 3-year figure. Stretching to 5 years gives 0.09, with an annualized covariance of 364.5 %².
Among the 10 assets we track against GCTK, SPY sits near the bottom by co-movement, at rank #6. Correlation aside, the last 12 months split them widely, with SPY ahead by 114.2 points (-93.6% versus +20.6%). Note the risk asymmetry: GCTK runs 12.0 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.
GCTK vs SPY: side by side
| GCTK (GlucoTrack, Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | -93.6% | +20.6% |
| 5-year return | -100.0% | +82.4% |
| Volatility (ann.) | 174.3% | 14.5% |
| Beta vs S&P 500 | 1.74 | 1.00 |
| Max drawdown (3Y) | -100.0% | -18.8% |
| Market cap | – | – |
| P/E (trailing) | 0.3 | – |
| Dividend yield | 0.00% | 1.01% |
| Expense ratio | – | 0.09% |
| Assets under management | – | $795.3B |
| Sector / category | US Listed | ETF · US Large Cap |
SPY is a Large Blend fund from State Street Investment Management: $795.3B under management, 504 holdings, a 0.09% expense ratio, a 1.01% trailing dividend yield.
Year-by-year returns
| Year | GCTK | SPY |
|---|---|---|
| 2022 | -66.2% | -18.2% |
| 2023 | -81.4% | +26.2% |
| 2024 | -71.5% | +24.9% |
| 2025 | -99.1% | +17.7% |
| 2026 | -92.6% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are GCTK and SPY good diversifiers for each other?
Yes. With a correlation of 0.14, GCTK and SPY have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
FAQ
What is the correlation between GCTK and SPY?
The GCTK/SPY correlation stands at 0.14 on a 3-year window (1 year: 0.19, 5 years: 0.09), computed from weekly returns as of 2026-08-27.
Is SPY a good diversifier for GCTK?
Yes. With a correlation of 0.14, GCTK and SPY have moved largely independently, which makes them a genuinely diversifying pair by historical standards.
What does a correlation of 0.14 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.
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Hubs: GCTK correlations · SPY correlations
