Jan 16 (Reuters) - Morgan Stanley's fourth-quarter profit dropped, hurt by one-time charges tied to a Federal Deposit Insurance Corporation's special assessment.

The bank's net income fell to $1.5 billion, or 85 cents per diluted share, in the three months ended Dec. 31, compared with $2.2 billion, or $1.26 per diluted share, last year. (Reporting by Manya Saini in Bengaluru and Tatiana Bautzer in New York; Editing by Lananh Nguyen)