Understanding Perps: The Most Widely Traded Financial Instrument in Crypto

Perpetual swaps, commonly referred to as 'perps,' are a dominant force in the crypto market, facilitating an estimated $40 to 50 trillion in annual trading volume. They have surpassed spot trading in popularity and are the go-to instrument for professional traders, hedge funds, and retail speculators seeking leveraged exposure to assets like bitcoin without actually owning them. Despite their widespread use, the mechanics behind perps remain poorly understood. To grasp the concept of perps, it's essential to consider their origins. In traditional finance, futures contracts are used to gain leveraged exposure to an asset, involving an agreement to buy or sell at a predetermined price on a specific date. When the contract expires, traders must roll over their position to maintain exposure. 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 and resulting in unwanted position closures when contracts expired. BitMEX, a derivatives exchange founded in 2014, attempted to address these problems by shortening contract durations, but this ultimately proved insufficient. The introduction of perpetual swaps in 2016 revolutionized the market by eliminating expiry dates altogether. This innovative contract tracks the price of an asset indefinitely, allowing traders to hold positions for any duration without the need for rolling or settlement. The absence of an expiry date presented a new challenge: without a natural anchor, the contract price could deviate significantly from the spot price. To mitigate this, a funding rate mechanism was implemented, where payments are exchanged between traders on opposite sides of the market every eight hours. If the perpetual swap price exceeds the spot price, long-position traders pay short-position traders, and vice versa. This self-correcting mechanism helps maintain equilibrium and is now widely adopted across the industry. Another key feature of perpetual swaps is leverage, enabling traders to control larger positions with relatively smaller amounts of capital. To manage the associated risks, exchanges employ automated liquidation systems, which close positions before they can incur significant losses. The efficiency and reliability of these systems have become a critical differentiator among exchanges. Today, perpetual swaps are the primary driver of price discovery in the crypto market, with price movements often originating in perp markets before spreading to spot markets. The structure of perpetual swaps has proven so resilient that regulators are now exploring their application to traditional assets, with the potential for the CME to list perpetual swaps on equities. What began as a workaround for the limitations of crypto futures has evolved into one of the most widely traded financial products globally.