Below is an excerpt from JPM's most recent 10-q where it discloses its losses in the CIO unit:
Since March 31, 2012, CIO has had significant mark-to-market losses in its synthetic credit portfolio, and this portfolio has proven to be riskier, more volatile and less effective as an economic hedge than the Firm previously believed. The losses in CIO's synthetic credit portfolio have been partially offset by realized gains from sales, predominantly of credit-related positions, in CIO's AFS securities portfolio. As of March 31, 2012, the value of CIO's total AFS securities portfolio exceeded its cost by approximately $8 billion. Since then, this portfolio (inclusive of the realized gains in the second quarter to date) has appreciated in value
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 its current synthetic credit positions for the longer term.
Accordingly, net income in Corporate likely will be more volatile in future periods than it has been in the past.