Former Island chief joins $10bn hedge fund group

Matthew Andresen, former chief executive of Island, the electronic communications network, has joined one of the world's largest hedge fund groups less than two years after joining Sanford C Bernstein, the fund manager.

Andresen has joined the executive team running the the marketmaking businesss of Citadel Investment Group. Citadel has almost $10bn (€8bn) under management.

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