FILE PHOTO: A sign is mounted on the side of

Flagging loan margins, one-off charges drag down profit at major US banks

FILE PHOTO: A sign is mounted on the side of a branch of the JPMorgan Chase & Co bank in New York

FILE PHOTO: A sign is mounted on the side of a branch of the JPMorgan Chase & Co bank in New York, March 15, 2013. REUTERS/Lucas Jackson/File Photo