The idea that crypto is uncorrelated with traditional markets used to be a selling point. Then 2022 happened, and Bitcoin started moving in lockstep with the Nasdaq. The correlation story is more complicated than either extreme suggests.
During calm, trending markets, crypto and equities often show low to moderate correlation. Bitcoin does its own thing based on crypto-specific narratives, on-chain dynamics, and sector-specific catalysts. This is the environment where the diversification argument holds up reasonably well.
During stress events, correlations spike toward 1. This is the worst possible time for correlations to increase, because it is exactly when you need diversification the most. The phenomenon, sometimes called correlation convergence, occurs because during panics, all risk assets become expressions of a single factor: risk appetite. And when risk appetite collapses, everything sells off together.
The driver of this increasing correlation is institutional participation. As more hedge funds, asset managers, and corporate treasuries hold crypto, their risk management processes force them to sell crypto alongside equities during portfolio de-risking events. This institutional behavior creates the mechanical linkage between crypto and traditional risk assets that did not exist when crypto was a purely retail market.
The correlation with the Nasdaq specifically is stronger than with the S&P 500, because both crypto and Nasdaq are expressions of the long-duration, high-growth trade. Both benefit from low interest rates and abundant liquidity, and both suffer when rates rise and liquidity tightens.
Rolling correlation is the right way to measure this relationship, not a single static number. The 90-day rolling correlation between Bitcoin and the Nasdaq fluctuates between -0.2 and 0.8, and understanding where you are in that range at any given time has practical implications for portfolio construction and hedging decisions.
Crypto-specific events can temporarily decouple correlation. Exchange collapses, regulatory announcements, or major protocol upgrades create crypto-specific price moves that are unrelated to traditional markets. But these decoupling episodes tend to be short-lived, and the macro-driven correlation reasserts itself over time.
For portfolio construction, the practical implication is that you cannot rely on crypto to hedge your equity portfolio during bear markets. It might provide diversification during normal times, but during the exact scenarios where you need hedging most, crypto is likely to move in the same direction as your equities.