Perpetual futures (perps) are derivative contracts that allow traders to speculate on cryptocurrency price movements — either long (profit if price rises) or short (profit if price falls) — with leverage, and with no expiry date. Unlike traditional futures contracts (which expire on a set date), perps can be held indefinitely. Perps are the most traded crypto derivative product, with daily volume often exceeding spot markets. HOW PERPETUAL FUTURES WORK A perp contract tracks the price of an underlying asset (e.g., BTC/USD) but is settled in cash — you never actually receive Bitcoin. You deposit collateral (USDC, ETH, or BTC), open a position with your chosen leverage (1x to 100x), and profit or lose based on price movement multiplied by your leverage. Leverage amplifies both gains and losses proportionally. THE FUNDING RATE MECHANISM Without expiry, perp contracts need a mechanism to keep their price anchored to the spot market. This is the funding rate: When perp price > spot price (more longs than shorts): Longs pay shorts a periodic funding fee — this incentivises more shorts and fewer longs, pushing the perp price back to spot. When perp price < spot price: Shorts pay longs. Funding rates are typically calculated and exchanged every 8 hours. During bull markets, funding rates are persistently positive — long traders pay continuously. CENTRALISED VS. DECENTRALISED PERPS Centralised (CEX perps): Binance, OKX, Bybit dominate. Off-chain order books, deep liquidity, fastest execution. Require KYC. Decentralised (DEX perps): dYdX v4 (Cosmos-based), GMX (Arbitrum/Avalanche), Hyperliquid (custom L1), Drift (Solana). On-chain, permissionless, self-custody. Hyperliquid became one of the highest-volume perp DEXs in 2024. RISKS OF TRADING PERPS Liquidation: If your position moves against you sufficiently, your collateral is liquidated automatically. 10x leverage means a 10% adverse move eliminates your position entirely. Funding rate drain: Holding leveraged long positions in bull markets incurs significant cumulative funding costs. Volatility risk: Crypto's extreme intraday volatility makes leveraged positions extremely risky.