 SHANGHAI LONDON--BUSINESS WIRE--Tradeweb Markets Inc. Nasdaq:TW, a leading, global operator of electronic marketplaces for rates, credit, equities and money markets, today announced the appointment of James Sun as Managing Director, Head of Asia. Based in Shanghai, Mr. Sun will be responsible for all of Tradewebs business operations in Asia, including offices in Hong Kong, Tokyo, Singapore. He will report to Enrico Bruni, Managing Director, Head of Europe and Asia Business, and work clos 