A perpetual contract, the “perp” on an exchange app, is a bet with a venue that a price will be higher or lower, with no date on which the bet has to end. It is usually margined: you post a fraction of the position, and the exchange treats the rest as if you had borrowed it. The coin itself stays where it was. If the screen says you are long one bitcoin at ten times leverage, you do not have one bitcoin. You have a contract whose profit and loss move like one bitcoin, until they don’t, because the margin ran out.
An exchange balance is an IOU, not a wallet. This page is that IOU with a multiplier and no maturity. It will not tell you whether to be long or short, what leverage to pick, or which app’s funding rate is “the” rate. Those are trades. This is the object the button creates.
No expiry is the whole trick
An ordinary future expires. On the date, the contract pays up against an index or delivers the thing, and if you want to keep the exposure you open a later month. That roll is a chore and a cost. A perpetual deletes the date. You can hold the position tomorrow, and next month, as long as the margin is still there and the venue is still there. There is nothing to roll because nothing matures. There is also nothing that forces the contract to become the coin. Closing the position, or being closed, is how it ends.
On 5 October 2026 CFTC staff said designated contract markets could, under conditions, strip the expiry off certain existing security-index futures and turn them into true perpetuals, including positions that would otherwise have died on 20 October. That letter is about stock-index contracts on a registered US exchange. It is not the bitcoin button on an offshore app, and it is not permission to lever up. The CFTC’s advance notice the same week, Regulation CTX and Regulation CAM, asks how leveraged retail crypto should sit on a registered market. Questions are not the licence. A perpetual is still a product design either way.
Funding is a payment, not interest on your coins
Because a perpetual never expires, something else has to tug its price back toward the spot index. That something is a funding payment, usually every eight hours, sometimes on another clock. If the perpetual trades above the index, the longs pay the shorts. If it trades below, the shorts pay the longs. The payment is between the two sides of the contract, taken through the exchange. It is not a dividend, not staking, and not yield on bitcoin you hold. A positive funding rate is not a reason to do anything. It is the contract admitting it has drifted from the coin.
You pay or receive funding for as long as the position is open. A quiet week of small payments can cost more than the fee you noticed on the way in. The app will show a countdown. Read it as a bill, not as a score.
Liquidation is the venue closing you
Margin is the collateral sitting under the position. If the price moves against you far enough that the remaining margin no longer covers the venue’s minimum, the position is liquidated: the exchange closes it, and the collateral can be gone. Leverage shrinks the distance to that price. At two times, a large move hurts. At ten or twenty times, a move that would be a dull afternoon on the spot market can wipe the margin. The liquidation price is on the ticket before you confirm. If you cannot point at it, you have not read the ticket.
A liquidation is not the blockchain “taking” your coins. On a typical centralised perp it is the company’s risk engine selling or buying the contract so the venue does not wear your loss. In a busy crash the engine can close you worse than the price you stared at, and it can close other people in the same minute. Insurance funds and auto-deleveraging are the venue’s ways of spreading what the engine could not finish. They are terms of service. They are not a protocol guarantee. Black Thursday in March 2020 was this machine in public, on a day when the spot price was also falling. The weather and the engine are different stories. Both can be true.
The coin and the contract are different ledgers
Spot bitcoin is an entry on Bitcoin. A perpetual quoted in bitcoin is usually an entry on an exchange’s database, denominated in a stablecoin or in the coin, settled in the venue’s wallet. Withdrawing “your bitcoin pnl” means asking the company to send you something. If the company cannot, the contract’s mark price is a number on a screen. Some on-chain perpetuals are software on a public ledger instead of a company database. DeFi is software with rules you cannot call support about. The liquidation is then a transaction anyone can see, still not a bitcoin you hold, and still not a customer-service desk.
A spot ETF is a wrapper, not a new bitcoin. A perpetual is a sharper wrapper: it can pay you for a move you do not own, and it can take the margin when the move goes the other way. Owning a share of a fund that holds coins, owning coins, and holding a leveraged contract are three products. The app that stacks them on one home screen has not made them the same.
What this guide will not do
It will not suggest a leverage setting, a funding strategy, or a venue. It will not walk through an order ticket click by click. It will not tell you that perpetuals are only for gamblers or only for professionals. People use them to hedge a coin they already hold, and people use them to punt a move they cannot afford in spot. The mechanism does not know which one you meant. If the amount in the margin is money that pays rent, the liquidation price is a housing question, not a personality test.
How to read a crypto headline without getting played still applies when the headline is a funding rate or a “liquidation cascade”. A cascade is a lot of these contracts closing at once. It can shove a price. It is not a law of the coin. Nothing here is an instruction to open, close, hedge, buy, or sell. If you want the coin, this page is the wrong button.
