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The US stock market has been on a tear, and a lot of it is running on borrowed money. That borrowed money just got pricier, which should make anyone holding risk assets, crypto included, pay attention.
Margin debt surged to an all-time record of $1.42 trillion in May 2026, according to FINRA data. That’s an 8.5% jump from April and a 53.7% increase compared to a year earlier. Meanwhile, the cost of equity financing has climbed to its highest level since December 2024, squeezed by surging demand and strained bank balance sheets.
The leverage machine behind the rally
Leveraged exchange-traded funds alone drove over $100 billion in net buying activity in the prior month. Of that, $38.1 billion concentrated in semiconductor stocks. Hedge funds are carrying gross equity exposure estimated at around $10 trillion.
Why financing costs are climbing
Banks are feeling the pressure on their balance sheets. The combination of record margin lending, prime brokerage activity for hedge funds, and the infrastructure required to support leveraged ETF rebalancing is stretching capacity. When banks hit those limits, they raise rates or tighten terms.
Wall Street strategists have flagged a specific concern around leveraged ETF rebalancing. These products need to buy more as prices rise and sell more as prices fall, creating a mechanical feedback loop. When the buying is this concentrated, over $100 billion in a single month, the rebalancing flows themselves become a meaningful force in the market.
What this means for crypto investors
The direct channel is liquidity. When equity financing costs rise, capital gets more expensive everywhere. The same banks and prime brokers serving hedge funds in equities also provide services to crypto-native funds and trading desks. Tighter balance sheets in traditional finance tend to tighten conditions across risk assets broadly.
Bitcoin and Ethereum have shown increasing correlation with equities during periods of deleveraging, precisely because the same pools of institutional capital now straddle both markets.
The 53.7% year-over-year increase in margin debt is particularly notable because it suggests the pace of leverage accumulation has been accelerating. With gross exposure at an estimated $10 trillion, even a modest reduction in leverage could free up or destroy significant capital that might otherwise flow into digital assets.
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