Margin trading refers to the business of China Merchants Securities lending funds to customers to buy securities or issuing securities for them to sell securities. China Merchants Securities must obtain the approval of China Securities Regulatory Commission to carry out margin financing and securities lending business, and securities companies are also qualified to provide margin financing and securities lending business for subordinate business departments. Without the approval of the China Securities Regulatory Commission, a securities company may not borrow or sell securities to customers. Whether China Merchants Securities has the qualification of margin financing and securities lending business can be obtained through public information disclosure channels and the website of securities companies. It is risky for China Merchants Securities to invest with its own funds, and there is no reason why professionals can make a steady profit. In fact, it is a good investment for China Merchants Securities to carry out margin financing and securities lending business. They can lend money borrowed from other financial institutions at benchmark interest rates to investors at high interest rates, and the interest difference between them is considerable.