JPMorgan Chase(JPM_) disclosed in its latest quarterly filing that it has suffered "significant" mark-to-market losses in its synthetic credit portfolio since the end of the first quarter. "This portfolio has proven to be riskier, more volatile and less effective as an economic hedge than the Firm previously believed," the bank said in its 10-Q. "The Firm is currently repositioning CIO's synthetic credit portfolio, which it is doing in conjunction with its assessment of the Firm's overall credit exposure. As this repositioning is being effected in a manner designed to maximize economic value, CIO may hold certain of ... (full story)