At 9:30 every weekday morning in a pristine, century-old stone mansion in Rowayton, Connecticut, Kenneth Tropin gathers the seven members of his risk committee to perform what has become, since November 2007, a 30-to-40-minute ritual: the forensic parsing of risk. Tropin, the 55-year-old founder and chairman of Graham Capital Management, initiated the meetings as a way to stay nimble and responsive to the ever-evolving global financial crisis and safeguard the firm’s $4.9