Funding Rates on Equity Perpetuals: What They Are and How To Read Them

If you've ever held a Bitcoin perpetual overnight, you've paid or received funding. It's the small credit or debit that shows up on your statement every eight hours, and most crypto traders learn to live with it — sometimes even to hunt it. But funding is not a crypto invention. It's a mechanism, and any perpetual contract on any underlying needs some version of it to work.

JTX runs perpetuals on 111 US equities, and those contracts need funding for exactly the same structural reason a BTC-PERP does. There's no expiry, no delivery, no natural moment when the perp price is forced to meet the underlying. Without a tether, the perp would drift. Funding is the tether.

This piece is for two kinds of trader: the crypto native who already gets funding but has never thought about how it behaves on a stock, and the cash-equities trader who has never seen a funding column on a trade blotter in their life. By the end you should be able to read a funding rate, price it into a position, and know when to fear it.

What a funding rate actually is

A funding rate is a periodic payment exchanged between the long side and the short side of a perpetual contract. It is not a fee JTX collects. We don't sit in the middle and take it. Longs pay shorts, or shorts pay longs, depending on which side is pushing the perp price away from where the underlying says it should be.

The direction is set by the premium: the difference between the perp's mark price and the underlying index price, averaged over the funding window.

• Perp trading above the index → longs are the aggressors → longs pay shorts.
• Perp trading below the index → shorts are the aggressors → shorts pay longs.

The economic logic is elegant. If longs have to keep paying to hold their position, some of them will close. That selling pressure drags the perp mark back toward the index. Funding is a self-correcting anchor.

Why perpetuals need it at all

A traditional futures contract has a fixed expiry. On that date, the contract settles against the underlying, and any gap between the two prices collapses to zero. That eventual convergence is what keeps the front-month future glued to spot in the weeks leading up to expiry — arbitrageurs know the meeting is coming.

A perpetual has no expiry. There is no scheduled meeting with the underlying. So the market needs a substitute mechanism that continuously nudges the perp toward the index. Funding is that substitute. Instead of one big convergence on expiry day, you get thousands of tiny economic pressures spread across every funding stamp.

How the rate is computed

At each funding stamp, JTX looks at the average premium of the perp's mark against its reference index over the preceding window, converts that premium into a rate, and applies it to every open position based on notional size.

The exact formula is displayed live for every symbol on our funding rates viewer, including the current rate, the predicted next rate, and the historical stamps. If you're about to open a swing position, that page is worth thirty seconds of your time.

The 8-hour cadence

JTX perpetuals — both crypto and equity — settle funding on an 8-hour cadence. Three stamps a day, at 00:00, 08:00, and 16:00 UTC. If your position is open at the stamp, you pay or receive. If you close five minutes before the stamp and reopen five minutes after, you owe nothing and are owed nothing.

This is the single most important operational fact about funding: it is a snapshot, not an accrual. Day traders who never hold across a stamp effectively trade with zero funding exposure. Swing traders who hold for days will cross many stamps, and the arithmetic compounds.

Equity perps vs crypto perps

Crypto perp funding tends to swing hard. BTC can move 5% in an hour and drag the perp premium with it, so eight-hour rates on crypto can occasionally hit levels that look painful annualized.

Equity perps behave differently. The underlying — say, AAPL — trades on the cash market for 6.5 hours a day. For the remaining 17.5 hours, there is no live cash tape. The JTX perp is still trading 24/7, but its index reference has to lean on the last cash print plus whatever forward information the market has. During calm overnight sessions, the equity perp premium stays tight, and funding rates on equity perps are typically narrower than their crypto cousins.

The exception is event risk. When a company reports earnings after the close, the perp starts pricing the news immediately. The last cash print is now stale. Premium can blow out, and the funding rate that lands at the next stamp can be dramatically wider than the in-hours baseline. This is the moment equity perp funding matters most.

Worked example: long AAPL-PERP through earnings

You're long 100 AAPL-PERP contracts at $180. Notional: $18,000. You hold across an earnings beat, the perp mark rallies to $189 overnight, and it prints at a persistent premium to the stale cash reference across three funding stamps.

Suppose the funding rate at each of those three stamps averages 0.03% (roughly triple the calm-tape baseline — plausible into an event). Each stamp costs:

$18,900 (updated notional) × 0.0003 = $5.67

Three stamps: ~$17 in funding paid.

Against that, your position P&L is 100 × ($189 − $180) = $900. Funding cost is under 2% of your gross win. Real, but not the story.

Now flip it. Same position, same event, but the earnings miss and you're on the wrong side of a premium reversal. Now you're a short-side beneficiary paying negative funding while also losing on price. The two effects don't cancel — but on a 24-hour hold, funding is almost never the dominant P&L line. Directional risk is.

When funding turns hostile

Funding becomes a real cost when a book gets structurally one-sided. If 90% of open interest is long into a hyped catalyst, the premium stays wide, and every eight hours the longs bleed a little more to the shorts. If you're the marginal long who arrived late, you're subsidising everyone who's been short all week.

Read the sign in advance. The funding rates viewer shows current rate, the predicted next stamp, and recent history. A rate that's been positive and widening for a full day is a queue of longs paying to stay long — and a signal that entering long from here means joining that queue.

Practical playbook

• Check funding before opening a swing. Thirty seconds on the viewer.
• Size funding into your thesis. On a two-week hold, forty-two stamps compound. On a two-hour scalp, funding is a rounding error.
• Consider closing before a stamp if you're the payer and your thesis doesn't require overnight exposure.
• Never let funding drive a trade you'd otherwise not take. The rate is small compared to the price move you're actually there for.
• Use the position calculator to model funding cost across a planned hold window before you click buy.

Funding on equity perps is not a scary new tax. It's the same mechanism that keeps every crypto perp honest, applied to a different underlying with different rhythms. Learn to read it, and it stops surprising you.

Open the funding rates viewer or launch the platform and watch a few stamps land — that's the fastest way to build intuition.