Bankrupt brokerage firm MF Global, which is missing some $600 million in customer funds, recently discovered that about $659 million of its customer segregated accounts resided in an account at banking heavyweight JPMorgan Chase (JPM: 33.78, -0.60, -1.73%), according to The Wall Street Journal. However, it’s unclear whether the money MF Global found out was at JPMorgan is directly tied to the customer funds that regulators have been searching for since the New York-based company filed for bankruptcy on Monday, the Journal reported on its website. For its part, JPMorgan plans to say this “isn’t the missing money,” a source...