J.P. Morgan Chase revealed in a regulatory filing Wednesday that it is the subject of a investigation by the U.S. Attorney’s office related to mortgage-backed securities issued by the firm and its subsidiaries. J.P. Morgan has received and responded to a number of subpoenas and informal requests from other state and federal authorities relating to the matter as well.

J.P. Morgan was informed in May the civil division made a preliminary conclusion the company violated “certain federal securities laws” relating to residential mortgage-backed securities offerings made in 2006 through 2007.

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