Former MF Global chief executive Jon Corzine may have known of a loan to one of the firm's European affiliates using segregated customer accounts, the head of the CME Group told a Senate panel yesterday, contradicting Corzine's own testimony earlier in the day.

Terence Duffy, executive chairman of the CME Group, told the Senate Agriculture Committee that a senior MF Global executive told a CME auditor that Corzine knew of the matter during a telephone call with regulators just before the firm's collapse in late October.