A Nomura logo is pictured at their office in the Manhattan borough of New York City, New York, on Jun 23, 2017. (Photo: REUTERS/Carlo Allegri) TOKYO: Nomura Holdings aims to expand its US credit portfolio to US$50 billion within 10 years and may seek small acquisitions to beef up its private credit business, the top Japanese investment bank's US asset management chief said. The goal is line with Nomura's strategy to increase investments in private markets and diversify sources of revenue to cushion the impact from wild fluctuations in the performance of its global trading business.