Uncovering Perps: The Hottest Trading Instrument in Crypto

Perpetual swaps, or 'perps', are a dominant force in the crypto trading landscape, facilitating an estimated $40 trillion to $50 trillion in annual volume. They surpass spot trading and serve as the go-to instrument for professional traders, hedge funds, and retail speculators seeking leveraged exposure to bitcoin and other assets without holding the underlying. Despite their widespread use, the mechanics driving perps remain poorly understood. To grasp perps, it's essential to consider their origins. In traditional finance, leveraged exposure typically comes through futures contracts, which involve an agreement to buy or sell at a set price on a specific date. When the date arrives, the contract expires, and traders must roll their position into the next contract. In crypto's early days, this practice created persistent issues, such as futures trading at a premium to the spot price, known as basis, which confused retail traders seeking straightforward exposure. Every time a contract expired, positions closed, regardless of the trader's intentions. BitMEX, founded by Arthur Hayes and Ben Delo in 2014, attempted to resolve this by shortening contract durations, but none of these efforts were sufficient. The perpetual swap, developed by Delo and launched by BitMEX in 2016, addressed the issue by eliminating the expiry date, creating a derivative contract that tracks an asset's price indefinitely. There is no settlement date, rolling, or expiry, allowing traders to hold positions for hours or years. This created a structural challenge: without an expiry date, nothing would naturally force the contract price back toward the spot price. 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 above the spot price, long traders pay short traders, and vice versa if it's below spot. The exchange takes no cut. The funding rate is calculated based on the deviation from spot over the preceding eight-hour window. This creates a self-correcting equilibrium, where high funding rates make it expensive to hold positions, reducing demand and pulling the price 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. Perpetual swaps also feature leverage, allowing traders to control positions larger than their deposited capital. To manage risk, platforms use automated liquidation systems, closing positions before they can go negative. The speed and reliability of these systems have become a key competitive differentiator. Perpetual swaps are now the primary venue for price discovery in crypto, with moves typically originating in perp markets before spreading to spot. The structure Delo built in 2016 has proven durable, with regulators in the U.S. exploring its application to traditional assets, and 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.