What is Leverage?

Leverage measures how much market exposure a trader controls per unit of collateral. At 10x leverage, $1,000 of margin backs a $10,000 position — a 1% adverse price move erases 10% of the margin. On perpetual futures the position notional (not the margin) determines funding payments, so leverage is the lever that scales funding income relative to the capital actually committed.

The exchange enforces leverage through the margin system. Initial margin sets the maximum leverage at entry (initial margin = 1 / max leverage), while maintenance margin defines the floor below which the position is liquidated. As leverage rises, the buffer between entry price and liquidation price shrinks, so the same volatility that is harmless at 3x can be fatal at 50x. Leverage does not change the funding rate itself — it multiplies the funding cash flow earned or paid on a larger notional per dollar of margin.

For funding-rate arbitrage this matters because the strategy is delta-neutral: a long on one venue is offset by an equal short on another, so directional price risk nets out and the profit is the funding differential. Traders therefore lever the notional up to amplify the funding carry on a fixed pool of capital. But leverage also amplifies the cost side — taker fees, slippage, and any residual basis move are all charged on the levered notional — and it raises liquidation risk on each leg independently if the two venues’ marks diverge before the spread converges.

Because both legs are levered, margin must be sized so that neither leg liquidates during normal mark-price dislocation. A responsible arbitrageur keeps effective leverage low enough that a temporary basis gap on one exchange does not trigger a liquidation that breaks the hedge and turns a market-neutral trade into a naked directional loss. The realistic net APR after fees and slippage — not the headline funding rate — is what should justify any given leverage level.