The Birth of a Revolution: How a Hong Kong Hike Paved the Way for Crypto Trading's Future

The concept of the perpetual swap, a groundbreaking financial product, was conceived on a hiking trail in Hong Kong in 2015. Ben Delo, a mathematician and BitMEX co-founder, was brainstorming with friend and derivatives trader Bavik, seeking a solution to the frustrations of quarterly, monthly, and weekly futures contracts. Customers were dissatisfied with positions closing without warning, and Delo wanted to create something that mimicked spot trading but offered the leverage of a derivatives exchange. The question "what if a future never expired?" sparked a chain reaction, with Bavik responding that it would be worth infinity from a mathematical standpoint. However, he proposed a solution: charge traders the bitcoin overnight rate, similar to the LIBOR in traditional finance. Delo built this concept into the perpetual swap, which debuted in May 2016. The core mechanism involved a futures contract with no expiry date, anchored to the spot price through a daily funding rate, where longs paid shorts or vice versa, depending on whether the swap was trading above or below spot. The early funding rate was derived from third-party lending markets but was later adjusted to a dynamic approach, looking inward at how the swap was trading rather than outward at external markets. This solution was elegant, as it gave market makers notice of how the rate was calculated and when it would be charged, creating a dynamic equilibrium. By 2017, BitMEX had become the most liquid bitcoin market, processing $3-4 billion daily, with the perpetual swap at its core. The product's success led to its adoption by other exchanges, and it is now considered one of the most successful financial innovations in history, with an estimated $40-50 trillion in annual turnover. The fact that traditional finance regulators are taking notice, with the CFTC reportedly making room for perpetual swaps and speculation about the CME listing them, is a testament to the product's impact.