The Hong Kong Stock Exchange (HKEX) has launched weekly options for the Hang Seng (HSI) and Hang Seng China Enterprises (HSCEI) indices at a “very opportune time” given protracted market volatility and growing client demand for risk management tools, according to Alex Siu, co-head of equities product development, markets at HKEX. “The discussion of developing weekly options began a few…