◇ GUIDE · ~3 MIN

Funding rate arbitrage

Can I earn from funding without taking directional risk?

◇ ON THIS PAGE

When funding is persistently positive, longs pay shorts every interval. Funding rate arbitrage is the desk practice of harvesting that payment while staying roughly neutral to price — typically spot long / perp short when the perp trades rich.

This guide explains the mechanics soberly. It does not promise returns.

◇ THE MECHANIC

Perps stay near spot because transfers cash between sides (Lesson 03). When longs are crowded, funding is often positive — shorts receive.

A classic :

Buy (or hold) spot BTC.
Short BTC perp with matched .
Collect funding on the short while delta nets ~0.

The reverse applies when funding is deeply negative and you are willing to pay to be long perp vs short spot.

◇ WHERE THE EDGE COMES FROM (AND GOES)

Gross: funding rate × notional × intervals held.

Net subtract: trading fees, borrow (if margin spot), withdrawal/deposit friction, slippage on entry and exit, and basis change if spot-perp spread moves.

◇ WORKED EXAMPLE

Short $100k perp / long $100k spot · +0.02%/h funding · 7 days

Gross ~$336 before fees — rate and basis must hold

Item	Estimate
Notional hedged	$100,000
Funding (short receives)	+0.02%/h
Hours	168
Gross funding	$100,000 × 0.02% × 168 ≈ $336
Typical watch-items	Taker fees on both legs, basis drift, rate flip

If funding drops to zero on day three, the back half earns nothing. If basis widens $200 against you on exit, it eats more than a day of carry.

◇ RISKS DESKS ACTUALLY MODEL

Rate regime change. Crowding clears after a squeeze; funding inverts. Shorts become payers.

Liquidation on the perp leg. Low margin on the hedge is not "safe" — gaps move mark. Cross-venue hedges add basis risk (liquidation guide).

Operational. Stuck withdrawals, API outages, delisting, margin currency mismatch (USDT vs USD).

Macro correlation. Carry trades unwind together. The yen-carry replay links TradFi flow to crypto perp funding — neutrality is conditional on liquidity.

Counterparty. Spot on one venue, perp on another doubles exposure to failure (Lesson 05: Venues).

◇ HYPERLIQUID AND HOURLY FUNDING

On Hyperliquid, funding settles hourly — more frequent cash flows, more frequent sign changes. Compare regimes on the Hyperliquid dashboard and read Hyperliquid funding explained. Illustrative · delayed.

Hourly funding does not make arb "better"; it makes rebalancing and monitoring more demanding.

◇ WHO THIS IS FOR

Sophisticated traders with:

Unified P&L across spot and perp
Margin headroom on the perp leg
Fee tier math that survives reality
No illusion of risk-free yield

Retail marketing that says "earn 50% APY from funding" usually shows gross funding at one snapshot, ignores fees, and hides basis and liquidation tail.

◇ RECAP

is hedged carry, not a coupon.
Edge = funding minus costs minus basis risk.
Rates flip; venues liquidate; macro breaks correlation.

Literacy before leverage: if you cannot explain what blows up the hedge, you are not arbing — you are running a hidden directional book.

Educational only — not investment advice.

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◇ FAQ

What is funding rate arbitrage on crypto perps?

It is usually a delta-neutral package — long spot (or dated future) and short perp, or the reverse — to collect funding when the perp trades rich or cheap versus spot. You earn the funding transfer while hedging price direction. Execution, fees, and basis drift determine whether the spread is actually positive after costs.

Can funding arbitrage be risk-free?

No. Funding rates change every interval; basis can move against you; exchanges can liquidate the perp leg if margin is thin; spot and perp can diverge on different venues during stress. Desk "arb" is a carry trade with operational and gap risk, not a guaranteed coupon.

What is a delta-neutral funding trade?

You hold offsetting delta — for example, buy $100k spot BTC and short $100k BTC perp — so small price moves net near zero while you receive or pay funding on the perp leg. Neutrality breaks if legs are mismatched, if one venue freezes, or if correlation fails in a crash.

What are the main risks of funding rate arbitrage?

Rate sign flips, widening basis, liquidation on the perp if under-margined, withdrawal or oracle issues, and counterparty failure. The August 2024 yen-carry shock showed macro flows breaking crowded hedges across asset classes — carry that looked safe until liquidity vanished.

Funding rate arbitrage

◇ THE MECHANIC

◇ WHERE THE EDGE COMES FROM (AND GOES)

◇ RISKS DESKS ACTUALLY MODEL

◇ HYPERLIQUID AND HOURLY FUNDING

◇ WHO THIS IS FOR

◇ RECAP

◇ FAQ

RELATED LESSONS

RELATED GUIDES

◇ THE MECHANIC

◇ WHERE THE EDGE COMES FROM (AND GOES)

◇ RISKS DESKS ACTUALLY MODEL

◇ HYPERLIQUID AND HOURLY FUNDING

◇ WHO THIS IS FOR

◇ RECAP