Understanding Perpetual Swaps: The Hottest Trading Instrument in Crypto

Perpetual swaps, also known as perps, have revolutionized the crypto trading landscape by providing a unique financial instrument that offers leveraged exposure to asset prices without the need for ownership. With estimated annual volumes ranging from $40 trillion to $50 trillion, they have surpassed spot trading and become the go-to product for professional traders, hedge funds, and retail speculators. Despite their widespread adoption, the inner workings of perps remain poorly understood. To grasp the concept of perps, it's essential to understand the traditional financial instruments that preceded them. In conventional finance, leveraged exposure to an asset is typically achieved through futures contracts, which involve an agreement to buy or sell an asset at a predetermined price on a specific date. However, this approach created persistent issues in the early days of crypto. Futures contracts traded at a premium to the spot price of bitcoin, causing confusion among retail traders seeking straightforward directional exposure. Moreover, when contracts expired, positions were closed regardless of the traders' intentions. BitMEX, a derivatives exchange founded in 2014, attempted to address these issues by shortening contract durations, but this approach ultimately proved insufficient. The breakthrough came with the introduction of perpetual swaps, which eliminated the expiry date entirely. This innovative contract tracks the price of an asset indefinitely, allowing traders to hold positions for hours or years without the need for rolling or expiry. The perpetual swap mechanism, developed by Ben Delo and launched on BitMEX in 2016, has become the industry standard. Every eight hours, a payment is exchanged between traders on opposite sides of the market, with the rate calculated based on the deviation of the perpetual swap price from the spot price over the preceding eight-hour window. This self-correcting equilibrium ensures that the contract price remains aligned with the spot price. The funding rate mechanism is now widely used by major derivatives exchanges worldwide. Another defining feature of perpetual swaps is leverage, which enables traders to control positions significantly larger than their deposited capital. To manage the associated risks, exchanges use automated liquidation systems to close positions before they can go negative, protecting the exchange from potential deficits. Perpetual swaps have become the primary venue for price discovery in crypto, with sharp price movements often originating in perp markets before spreading to spot. The structure developed by Delo has proven durable, and regulators in the U.S. are now exploring its application to traditional assets, with the potential listing of perpetual swaps on equities by the CME.