Yael Perrin, head of developed synthetic products and Michael Winkelgrund, equity derivatives head of ETF market making and delta one execution at Goldman Sachs, have recently left the firm. Perrin was in charge of proprietary and franchise trading in delta one index derivatives and index arbitrage on all European blue chip indices. He joined Goldman Sachs in 2008 from HSBC Financial Products, where he spent three years in index arbitrage and delta one trading. Perrin started his career as an