investment banking       
noun [ U ] uk/ɪnˌvest.mənt ˈbæŋk.ɪŋ/ us/ɪnˌvest.mənt ˈbæŋk.ɪŋ/
 投资银行业务
the business of operating an investment bank
  an investment banking firm 一家从事投 资银行业务的 公 司 
 See: investment bank
 - More examples
 - He belonged to a group of men of privilege with backgrounds in law or investment banking.
 - New England's biggest bank will sell its investment banking subsidiary at a loss of hundreds of millions.
 - Since its launch in 1969, Robertson's mission was to provide top-quality investment banking services to small technology firms.
 - Earnings at the company's investment banking and corporate lending business rose 4 percent.