Bitcoin ETF Correlation with Equities: The Changing Picture

September 4, 2026• 7 min

Bitcoin's correlation with US equities has trended higher since the ETF launch. Here is what the data shows and why the correlation matters for portfolio construction.

TL;DR. Bitcoin's rolling 1-year correlation with the S&P 500 has averaged 0.4-0.5 since the spot Bitcoin ETF launch in January 2024 — higher than the pre-ETF range of 0.2-0.4. The increase reflects institutional flows that are correlated across asset classes (rotation from equities into bitcoin and back, common macro drivers). For diversification purposes bitcoin still provides meaningful uncorrelated return, but less than the pre-ETF "uncorrelated digital gold" framing suggested.

The correlation data

Rolling 1-year correlation (252 trading days) of bitcoin vs major US equity benchmarks since the spot ETF launch:

Period	BTC vs SPY	BTC vs QQQ	BTC vs IWM (small-cap)
Q1 2024	0.45	0.50	0.30
Q2 2024	0.40	0.45	0.32
Q3 2024	0.50	0.55	0.35
Q4 2024	0.55	0.60	0.40
Q1 2025	0.48	0.52	0.38
Q1 2026 (current)	0.42	0.48	0.30

The correlation is meaningfully positive but well below 1.0. Bitcoin still contributes diversification benefit, but it's not the near-zero correlation that the "digital gold" framing implied in earlier years.

What is driving the higher correlation

Three structural factors:

ETF-mediated retail flow. Investors allocating to Bitcoin ETFs are often the same investors allocating to equity ETFs. When sentiment shifts (risk-on or risk-off), both flows move together.
Macro driver convergence. Bitcoin has become more sensitive to US rate cycles, dollar strength, and liquidity conditions — the same drivers that move equities. Less idiosyncratic crypto-specific behavior.
Trading hours alignment. US-listed Bitcoin ETFs trade during US equity hours. Most institutional rebalancing and flow happens in those hours, mechanically pulling correlation up.

The risk-off vs risk-on asymmetry

Bitcoin's correlation with equities is asymmetric: higher during stressed/risk-off periods, lower during steady risk-on periods. Specific examples:

March 2020 (pre-ETF): BTC correlation with SPY spiked to 0.7+ during the COVID crash.
August 2024 (yen carry unwind): Correlation spiked to 0.65 during the 3-day equity sell-off.
Q3-Q4 2024 steady rally: Correlation moderated to 0.45-0.50 during the steady risk-on period.

This is a typical pattern for risk assets — correlations rise in stress, suggesting bitcoin behaves more like equities than gold during exactly the moments when diversification matters most.

Portfolio implications

For portfolio construction:

Bitcoin's 0.4-0.5 correlation with equities is similar to mid-cap growth equity vs large-cap S&P 500. It provides some diversification but not dramatic uncorrelated return.
Compared to gold (correlation ~0.1 with SPY) or long bonds (correlation -0.1 to 0.2), bitcoin is a weaker pure diversifier.
Bitcoin's diversification benefit is increasingly explained by its high standalone Sharpe (high return per unit of risk) rather than by correlation properties alone.

This is part of why allocation frameworks like BlackRock's (covered in Bitcoin ETF portfolio allocation) emphasise the modest 1-2% sleeve rather than treating bitcoin as a major uncorrelated diversifier.

Comparing to gold's correlation profile

For context, the same 1-year rolling correlations for gold (GLD) over the same window:

GLD vs SPY: typically 0.10-0.20.
GLD vs QQQ: typically 0.10-0.15.
GLD vs TLT (long bonds): typically 0.20-0.40 (gold and bonds both benefit from rate cuts).

Gold's correlation profile is meaningfully lower than bitcoin's. The "bitcoin as digital gold" thesis is contradicted by the actual correlation data — bitcoin trades closer to a risk asset than to a true safe-haven. See Gold ETF vs Bitcoin ETF.

The macro regime context

Correlations are regime-dependent:

In low-volatility risk-on regimes (steady equity bull market), correlation tends to settle at 0.3-0.4.
In stressed regimes (rate shocks, geopolitical events), correlation can spike to 0.6+.
In bitcoin-specific events (halvings, regulatory news, major ETF flow shifts), correlation can briefly drop as idiosyncratic factors dominate.

Average correlation across regimes is moderate-positive, but the variance matters for risk management.

FAQ

What is the correlation between Bitcoin and the S&P 500?

Rolling 1-year correlation has averaged 0.4-0.5 since the spot Bitcoin ETF launch in January 2024 — higher than the pre-ETF range of 0.2-0.4. The correlation is meaningfully positive but well below 1.0; bitcoin still provides diversification benefit, just less than the "uncorrelated digital gold" framing once suggested.

Did the Bitcoin ETF increase correlation with equities?

Yes, modestly. ETF-mediated flows mean the same investors allocating to equity ETFs are often allocating to Bitcoin ETFs in the same direction. US trading hours alignment, macro driver convergence, and shared sentiment cycles all contribute. The correlation is higher post-launch but still moderate.

Is Bitcoin still a good portfolio diversifier?

At small allocations (1-5%) yes — bitcoin contributes risk-adjusted return improvement via its high standalone Sharpe ratio more than via low correlation. As a pure diversification play, gold or long bonds correlate less with equities. Bitcoin is more of a "high-return-asymmetric-tail" addition than a "negative-correlation hedge".

Does correlation spike during market crashes?

Yes. Bitcoin correlation with equities has consistently spiked during stress events — March 2020 (0.7+ during COVID crash), August 2024 (0.65 during yen unwind), and various smaller events. This asymmetry means bitcoin provides less protection during exactly the moments when diversification is most valuable.

How does Bitcoin compare to gold on correlation?

Gold's correlation with equities is typically 0.10-0.20 — much lower than bitcoin's 0.40-0.50. Gold is the better pure diversifier. Bitcoin's edge is higher expected return, not lower correlation. Many portfolios hold both to combine gold's stability with bitcoin's asymmetric upside.