Understanding Perpetual Swaps: The Dominant Force in Crypto Trading

Perpetual swaps, also known as perps, have become the go-to trading instrument in the crypto market, with an estimated annual volume of $40 trillion to $50 trillion. They surpass spot trading in popularity and are the preferred choice for professional traders, hedge funds, and retail speculators seeking leveraged exposure to bitcoin and other cryptocurrencies without directly owning the assets. Despite their widespread use, the underlying mechanics of perpetual swaps are not well understood. To grasp the concept of perps, it's essential to look at the traditional finance backdrop, where leveraged exposure typically involves futures contracts with set prices and expiration dates. However, this approach created persistent issues in the early days of crypto, including premiums on futures contracts and the need for frequent contract roll-overs. BitMEX addressed these issues by introducing perpetual swaps, which eliminated expiration dates and created a derivative that tracks asset prices indefinitely. This innovation introduced a structural challenge, as the lack of an expiration date meant that contract prices could deviate from spot prices without a natural correction mechanism. To address this, BitMEX implemented a funding rate mechanism, where payments are exchanged between traders every eight hours based on the deviation between the perpetual swap price and the spot price. This self-correcting mechanism has become an industry standard. Another key feature of perpetual swaps is leverage, allowing traders to control larger positions with lower capital requirements. However, this also increases the risk of significant losses, which is managed through automated liquidation systems that close positions before they can incur negative balances. Perpetual swaps have become the primary venue for price discovery in crypto, with price movements often originating in perp markets before spreading to spot markets. Their success has also attracted the attention of regulators, who are exploring the application of perpetual swaps to traditional assets.