IDCC vs SPY: Correlation
Measured on weekly returns over the past three years, InterDigital, Inc. (IDCC) and SPDR S&P 500 ETF Trust (SPY) carry a correlation of 0.34, a moderate link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are IDCC and SPY?
Over the past 3 years, IDCC and SPY moved with a correlation of 0.34, which is moderate. Little has changed lately, as the 1-year reading of 0.36 lands near the 3-year figure. Over 5 years the correlation is 0.39, and the annualized covariance of weekly returns is 192.9 %².
Among the 11 assets we track against IDCC, SPY ranks #6 by 3-year correlation. Their 12-month results are close: +25.2% for IDCC against +20.6% for SPY. One caveat on sizing: IDCC is 2.7 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.
IDCC vs SPY: side by side
| IDCC (InterDigital, Inc.) | SPY (SPDR S&P 500 ETF Trust) | |
|---|---|---|
| 1-year return | +25.2% | +20.6% |
| 5-year return | +406.1% | +82.4% |
| Volatility (ann.) | 38.9% | 14.5% |
| Beta vs S&P 500 | 0.92 | 1.00 |
| Max drawdown (3Y) | -36.5% | -18.8% |
| Market cap | $8.6B | – |
| P/E (trailing) | 39.4 | – |
| Dividend yield | 0.81% | 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 | IDCC | SPY |
|---|---|---|
| 2022 | -29.3% | -18.2% |
| 2023 | +123.7% | +26.2% |
| 2024 | +81.1% | +24.9% |
| 2025 | +66.0% | +17.7% |
| 2026 | +5.8% | +13.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are IDCC and SPY good diversifiers for each other?
A fair diversifier. At 0.34, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between IDCC and SPY?
The IDCC/SPY correlation stands at 0.34 on a 3-year window (1 year: 0.36, 5 years: 0.39), computed from weekly returns as of 2026-08-27.
Is SPY a good diversifier for IDCC?
A fair diversifier. At 0.34, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.34 mean?
A reading of 0.34 sits on a scale from −1 (opposite moves) through 0 (unrelated) to +1 (identical moves). Correlation captures direction, not magnitude or performance.
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Related comparisons
Hubs: IDCC correlations · SPY correlations
