On Tuesday JPMorgan said it had racked up $1.5 billion of losses so far this quarter on mortgage-linked assets, reflecting deepening turmoil in credit markets.

As of June 30, JPMorgan held $19.5 billion of prime and Alt-A mortgage exposure, $1.9 billion of subprime mortgage exposure, and $11.6 billion of commercial mortgage-backed securities (CMBS) exposure, a filing showed.