Morgan Stanley has hired David Grimes, v.p. and equity derivatives trader with JPMorgan in New York, as an executive director in the same role. At Morgan Stanley, he reports to Ajay Khanna, managing director and head of the equity derivatives trading desk in New York. Melissa Stonberg, spokeswoman for Morgan Stanley, confirmed the hire. At JPMorgan, Grimes reported to Joseph Ghartey, managing director and head of equity derivative flow products, said spokesman Brian Marchiony.