Hong Kong Exchanges & Clearing Limited (HKEx), which hosts the world’s largest listed warrants market, has asked Reuters to provide end-of-day implied volatility and delta data in a bid to improve investor understanding of the factors affecting pricing.It will be available on HKEx's new web-based Derivative Warrant Resource Centre. Hong Kong hosts the world's largest listed warrants market. In addition, Hong Kong’s equities derivatives market has a turnover of over US$67bn so far this year.