Perpetual futures in plain English: the bet that never expires
Perps are the instrument behind nearly every vault you'll evaluate. Margin, leverage, funding, liquidation — explained with no formulas, because you should never fund a strategy you can't explain.
Almost every vault you will ever evaluate on Hyperliquid trades one instrument: the perpetual future, or "perp." You don't need to trade perps yourself to invest in a vault — but you should never put money behind an instrument you can't explain at a dinner table. This post gets you there.
A bet on the price, without the coin
A perpetual future is an agreement to bet on a price. Go long and you profit when the price rises; go short and you profit when it falls. You never own the bitcoin or the token itself — you hold a bet about its price, and your profit or loss settles in dollars (on Hyperliquid, in USDC, a dollar-pegged token).
Old-fashioned futures expire on a date. Perps never do — hence the name. You can hold the bet for a minute or a year.
Margin: the deposit behind the bet
To open a bet, you post a deposit — the margin. It's collateral: proof you can cover your losses. Win, and your margin grows. Lose, and losses are deducted from it, in real time, around the clock. Crypto doesn't close on weekends.
Leverage: the multiplier on everything
Leverage lets you control a bet larger than your deposit. With $1,000 of margin at 10x leverage, you're running a $10,000 position: every 1% move in the price now moves your deposit by 10%. The arithmetic is symmetric and merciless — 10x turns a 5% favorable move into +50%, and a 10% adverse move into a wipeout.
Liquidation: the house closes your bet for you
When losses eat your margin down to a critical level, the exchange doesn't wait for your permission — it closes the position. That's liquidation: an automatic eviction, usually at the worst moment, that turns a paper loss into a final one. At 10x leverage, a roughly 10% move against you is all it takes. This single mechanic explains most of the spectacular vault blowups you'll see in the reviews: leverage plus a sudden move equals a hole no recovery can fill, because the position no longer exists to recover.
Funding: the rent that keeps the bet honest
One puzzle remains: if a perp is just a bet, what stops its price from drifting away from the real price of bitcoin? The answer is funding — a small payment exchanged between longs and shorts every hour. When too many people are long and the perp trades above the real price, longs pay shorts a little rent, nudging the crowd back. When shorts dominate, the rent flows the other way. It's a thermostat: most of the time you barely notice it, but in euphoric markets the rent gets expensive — and some strategies (including some vaults) earn their entire living just collecting it.
Why this matters for choosing vaults
Every number on a vault's page is downstream of these four ideas. APR? Often a leveraged streak, annualized. Drawdown? Watch for liquidations, not just losses. "Market-neutral income"? Probably funding collection — which works until the thermostat flips. Now that the instrument is clear, the next post opens the thing this series is really about: the vault itself.