Proprietary business refers to a business in which investment banks use their own funds and borrowed funds to directly participate in securities market transactions and bear risks.

1. Market making business: Investment banks create markets for securities transactions and create liquidity for the securities market by quoting securities transactions.

2. Proprietary trading business: In the secondary market, investment banks conduct transactions with their own or raised funds through their own accounts to obtain price differences.

At this time, the investment bank is called a transaction or Trader.

Extended information: Proprietary trading conditions: possess securities legal person qualifications, comply with securities regulations, have a certain business scale, registered capital reaches legal standards, securities business personnel and management personnel reach the specified number, and have fixed business premises and necessary facilities.