The Accidental Innovation: How a Hong Kong Hike Revolutionized Crypto Trading

The concept of the perpetual swap, also known as a perpetual future or 'perp,' was conceived on a hiking trail in Hong Kong in 2015. Ben Delo, BitMEX co-founder and mathematician, was discussing a persistent problem with a friend, Bavik, a derivatives trader. BitMEX had experimented with various futures contracts, but customers consistently complained about positions closing without warning, seeking a product that mimicked spot trading but offered the leverage of derivatives. Delo's question, 'What if a future never expired?' sparked a pivotal conversation. Bavik's response, 'Mathematically, it would be worth infinity,' led to the idea of charging traders an overnight rate, similar to LIBOR in traditional finance. However, the bitcoin overnight rate did not exist at the time, prompting Delo to create it. This innovation would become one of the most significant financial products of the 21st century. Initially, BitMEX targeted institutional hedgers, but the exchange ultimately attracted sophisticated retail traders seeking speculation and high leverage. The introduction of 100x leverage in 2015, facilitated by Delo's real-time margining system, marked a turning point. The perpetual swap, launched in May 2016, featured a daily funding rate to keep the contract price aligned with the spot price. Although the early funding rate was derived from external lending markets, it eventually became dynamic, adjusting to the swap's trading activity. This mechanism has since been adopted by major derivatives exchanges worldwide. By 2017, BitMEX had become the most liquid bitcoin market, with the perpetual swap at its core. The concentration of liquidity was a direct result of the swap's design, which consolidated market maker capital into a single instrument. Competitors took notice, with some exchanges copying the concept. Today, the perpetual swap is considered a groundbreaking financial innovation, with an estimated annual turnover of $40-50 trillion. As traditional finance regulators begin to recognize the product's potential, Delo sees this as the ultimate validation of an idea born from a simple question on a Hong Kong hiking trail.