He went to Salomon Brothers as a special consultant , then becoming a managing director and co-head of its fixed - income - derivative group .
In 1990 Scholes became more involved directly with the financial markets .
Scholes went to Salomon Brothers as a special consultant , then becoming a managing director and co-head of its fixed - income - derivative group .
In 1990 Scholes became more involved directly with the financial markets .