Shanghai 50 and Shenzhen 40 stocks can be used for margin trading. The threshold for margin trading and stock index futures is 500,000. On February 13, 2012, the scope of target securities for the margin trading and securities lending pilot was determined to be the same as the constituent stocks of the Shanghai Stock Exchange 50 Index and the Shenzhen Stock Exchange Component Index. A total of 90 stocks were selected as the target stocks for margin trading and securities lending.

The answer comes from the Golden Ax Stock Question and Answer Network