In 2015, a hike in Hong Kong's picturesque trails marked the birth of the perpetual swap, a concept that would forever alter the landscape of crypto trading. Ben Delo, BitMEX's co-founder and a mathematician by training, was grappling with a problem that had been plaguing him for months. Alongside his friend Bavik, a derivatives trader, Delo was searching for a solution to the conundrum of futures contracts that seemed to confuse and frustrate customers. The issue at hand was the perpetual nature of a futures contract, one that would never expire, thus eliminating the need for constant renewal or closure.
The question was, how could this be achieved without running into mathematical inconsistencies? The answer lay in charging traders an overnight rate, akin to LIBOR in traditional finance, but with a twist - the rate would be derived from the bitcoin market itself. And so, the perpetual swap was born, a financial product that would go on to revolutionize the crypto trading landscape.
The journey to this point was not without its challenges. BitMEX, founded in 2014 by Delo and Arthur Hayes, was initially designed with institutional hedgers in mind. However, the exchange quickly found itself catering to a different demographic - sophisticated retail traders looking to speculate with high leverage.
To meet this demand, BitMEX introduced 100x leverage, made possible by Delo's real-time margining system. The perpetual swap, launched in 2016, was the culmination of this journey. Its core mechanic was straightforward: a futures contract with no expiry date, anchored to the spot price through a daily funding rate.
Longs paid shorts, or vice versa, depending on the swap's price relative to the spot price. The funding rate was initially derived from external lending markets but was later adjusted to a dynamic model, looking inward at the swap's trading activity.
This innovation proved pivotal, as it allowed the swap to maintain a stable price and attracted market makers who helped anchor the price to the spot price. The impact of the perpetual swap was profound.
By 2017, BitMEX had become the most liquid bitcoin market, with the perpetual swap at its core. The exchange's daily trading volume reached $3-4 billion, with price discovery for bitcoin happening on the BitMEX order book rather than traditional exchanges like Coinbase or Bitstamp.
The concentration of liquidity was a direct result of the swap's design, which collapsed multiple contracts into one instrument. Competitors took notice, and soon every major exchange in crypto offered its own perpetual swap, built on the funding rate architecture pioneered by Delo. Today, the perpetual swap is considered one of the most successful financial products in history, with an estimated annual turnover of $40-50 trillion. As traditional finance regulators begin to take notice, the prospect of perpetual swaps being listed on equities or recognized under regulatory frameworks is becoming increasingly likely.
For Delo, this is the ultimate validation of a concept born on a Hong Kong hiking trail, a testament to the power of innovation in the financial sector.