RKDA vs SPY: Correlation
Measured on weekly returns over the past three years, Arcadia Biosciences, Inc. (RKDA) and SPDR S&P 500 ETF Trust (SPY) carry a correlation of 0.20, a weak link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are RKDA and SPY?
Across a 3-year window, the weekly returns of RKDA and SPY correlate at 0.20, weak. Little has changed lately, as the 1-year reading of 0.16 lands near the 3-year figure. Stretching to 5 years gives 0.16, with an annualized covariance of 292.6 %².
Among the 13 assets we track against RKDA, SPY sits near the bottom by co-movement, at rank #10. Their recent paths diverged sharply: over the last 12 months SPY outperformed by 107.2 percentage points (-86.6% for RKDA against +20.6% for SPY). Risk is not evenly split, since RKDA carries 6.9 times the volatility of the other side.
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.
RKDA vs SPY: side by side
| RKDA (Arcadia Biosciences, Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | -86.6% | +20.6% |
| 5-year return | -99.5% | +82.4% |
| Volatility (ann.) | 100.4% | 14.5% |
| Beta vs S&P 500 | 1.40 | 1.00 |
| Max drawdown (3Y) | -93.4% | -18.8% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| 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 | RKDA | SPY |
|---|---|---|
| 2022 | -73.9% | -18.2% |
| 2023 | -71.1% | +26.2% |
| 2024 | +89.1% | +24.9% |
| 2025 | -66.6% | +17.7% |
| 2026 | -74.1% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are RKDA and SPY good diversifiers for each other?
A fair diversifier. At 0.20, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between RKDA and SPY?
Using weekly returns as of 2026-08-27: 0.20 over 3 years, with 0.16 over the last year and 0.16 over 5 years.
Is SPY a good diversifier for RKDA?
A fair diversifier. At 0.20, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
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.
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Related comparisons
Hubs: RKDA correlations · SPY correlations
