big xyt, the independent provider of market data analytics and smart data solutions, is aiming to expand its US client base after hiring Jenny Chen from Société Générale where she was head of global execution services. Based in New York , Chen has joined big xyt as managing director, head of sales in the Americas. Chen told Markets Media:  “I have spent my entire career on the execution side and have seen the evolution of electronic trading and the need for accurate data and smart analytics.