The sudden passing of Christopher Callahan, founder of Toronto's Traynor Ridge Capital Inc., has triggered an in-depth review of the hedge fund's considerable recent losses. The Ontario Securities Commission (OSC) suspended all trades by Traynor Ridge pending a thorough investigation. The fund's trading missteps earlier in the month resulted in substantial losses, approximated between C$85 million to C$95 million, as detailed in an OSC report dated Oct. 30.