Lewis Ranieri, one of the pioneers of the US mortgage-backed securities market, has become chairman of the advisory board of SuperDerivatives, the foreign exchange options pricing system vendor. The move comes as SuperDerivatives is looking to expand into other asset classes. Ranieri is also chairman of Hyperion Partners, which has been a backer of SuperDerivatives since the company's launch in 1999. Prior to forming Hyperion. Mr Ranieri worked for Salomon Brothers from 1968 to 1987. People Chicago Board of...