Uncovering Perps: The Crypto Trading Instrument Taking the World by Storm

Perpetual swaps, or 'perps', have emerged as the go-to trading instrument in the crypto market, with estimated annual volumes ranging from $40 trillion to $50 trillion. They surpass spot trading and offer professional traders, hedge funds, and retail speculators leveraged exposure to bitcoin and other assets without requiring ownership. Despite their widespread use, the inner workings of perps remain poorly understood. To grasp the concept of perps, it's essential to consider their origins. In traditional finance, leveraged exposure to an asset typically involves a futures contract, which is an agreement to buy or sell at a set price on a specific date. When the contract expires, it settles, and traders must roll over their position to maintain it. In the early days of crypto, this practice created persistent issues. Futures traded at a premium to the spot price of bitcoin, causing confusion among retail traders seeking straightforward exposure. Every time a contract expired, positions were closed, regardless of the trader's intentions. BitMEX, founded by Arthur Hayes and Ben Delo in 2014, attempted to address this by shortening contract durations, but the problem persisted. The perpetual swap, developed by Delo and launched by BitMEX in 2016, resolved the issue by eliminating the expiry date altogether. This created a derivative contract that tracks the price of an asset indefinitely, with no settlement date, rolling, or expiry. Traders can now hold positions for hours or years. However, this created a structural challenge: without an expiry date, nothing would naturally force the contract price back toward the spot price of the underlying asset. BitMEX solved this through a mechanism that has become the industry standard. Every eight hours, a payment is exchanged between traders on opposite sides of the market. If the perpetual swap is trading above the spot price, long positions pay short positions, and vice versa. The exchange does not take a cut. The funding rate, which determines the payment rate, is calculated based on the deviation from the spot price over the preceding eight-hour window. This creates a self-correcting equilibrium, where high funding rates reduce demand and pull the price back toward spot. Market makers accelerate this process by shorting the perpetual swap and buying spot when a premium opens up, capturing the difference as profit. The funding rate mechanism is now used by every major derivatives exchange. Leverage is another defining feature of perpetual swaps. Most exchanges allow traders to control positions significantly larger than their deposited capital, with limits varying by platform and jurisdiction. To manage the risk, perpetual swap platforms use automated liquidation systems. If a trader's losses approach the value of their deposited margin, the system closes the position before it can go negative, protecting the exchange. The speed and reliability of this liquidation engine have become key competitive differentiators. Perpetual swaps have become the primary venue for price discovery in crypto, with sharp moves in bitcoin typically originating in perp markets before spreading to spot. The structure developed by Delo in 2016 has proven durable, and regulators in the U.S. are now exploring its application to traditional assets, with the CME potentially listing perpetual swaps on equities. What began as a workaround for crypto futures limitations has become one of the most traded financial products globally.