Global Banking offers business banking and investment banking services. It includes Global Corporate, Global Commercial, Business, and Global Investment Banking. It generated 22% of the company's revenue in 2016. Corporate and Investment Banking (GCIB) was previously known as Banc of America Securities LLC. Merrill Lynch, the bank's investment banking unit, handled mergers and acquisitions, underwriting, capital markets, and sales and trading in fixed income and equity markets. Leveraged finance and mortgage-backed securities (MBS) constitute its strongest groups. The firm has the largest research team on Wall Street. It is headquartered in New York City.