Citigroup Inc. (C) has reportedly implemented a new round of job cuts in its U.S. investment bank business as part of its planned restructuring efforts. Particularly, per filings with the New York State Department of Labor dated Apr 1, the company will lay off 430 people.Bankers in the technology, media and telecom space are likely to be affected.Last week, the bank announced the completion of major actions to simplify its operating structure and improve performance, which were initially announced in Septem ...