Nomura Holdings Inc plans a shift in focus in the United States toward client-oriented services from market-based trading, the chief executive said, in its latest attempt to establish a profitable business in a major overseas economy. Japan’s biggest investment bank will move resources into areas such as mergers-and-acquisition (M&A) advisory, Koji Nagai said in an interview. The approach would differ from his predecessors, whose emphasis on securities in the U.S. and Europe ended in heavy losses.