"This action, which follows Morgan Stanley's initial investigation and reporting of his misconduct, makes clear that misuse of client account information will not be tolerated," the bank said in a statement.
His sentencing is scheduled for Dec. 7. As part of the plea deal, Marsh has agreed not to appeal any prison sentence of 37 months or shorter.
The case is U.S. v. Marsh, U.S. District Court for the Southern District of New York, No. 15-641. (Reporting by Joseph Ax; Editing by Alan Crosby)