NHTC vs SPY: Correlation
Measured on weekly returns over the past three years, Natural Health Trends Corp. (NHTC) and SPDR S&P 500 ETF Trust (SPY) carry a correlation of 0.21, a weak link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are NHTC and SPY?
Across a 3-year window, the weekly returns of NHTC and SPY correlate at 0.21, weak. Lately the two have moved closer together, with the 1-year correlation at 0.36 versus 0.21 over 3 years. Stretching to 5 years gives 0.30, with an annualized covariance of 124.0 %².
By 3-year correlation, SPY places #6 of the 13 assets tracked against NHTC. The last year tells two different stories: SPY led by 76.8 percentage points, -56.2% for NHTC against +20.6% for SPY. One caveat on sizing: NHTC is 2.8 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
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.
NHTC vs SPY: side by side
| NHTC (Natural Health Trends Corp.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | -56.2% | +20.6% |
| 5-year return | -50.8% | +82.4% |
| Volatility (ann.) | 40.5% | 14.5% |
| Beta vs S&P 500 | 0.59 | 1.00 |
| Max drawdown (3Y) | -71.7% | -18.8% |
| Market cap | – | – |
| P/E (trailing) | – | – |
| Dividend yield | 35.09% | 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 | NHTC | SPY |
|---|---|---|
| 2022 | -42.1% | -18.2% |
| 2023 | +96.2% | +26.2% |
| 2024 | -11.5% | +24.9% |
| 2025 | -20.5% | +17.7% |
| 2026 | -41.3% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are NHTC and SPY good diversifiers for each other?
Reasonably. At 0.21, NHTC and SPY keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
FAQ
What is the correlation between NHTC and SPY?
As of 2026-08-27, the correlation of weekly returns between NHTC and SPY is 0.21 over 3 years, 0.36 over 1 year and 0.30 over 5 years.
Is SPY a good diversifier for NHTC?
Reasonably. At 0.21, NHTC and SPY keep a meaningful degree of independence, and combining them has historically reduced portfolio volatility.
What does a correlation of 0.21 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: NHTC correlations · SPY correlations
