Lock-up shares worth about 47.1 billion yuan (about 7.14 billion U.S. dollars) will become eligible for trading on the Shanghai and Shenzhen stock exchanges in the coming week.
The amount is 20 percent less than last week, according to data compiled by information service provider Wind.
Lock-up shares from 56 listed companies will become tradable from Aug. 21 to 25, it said.
Under China's market rules, major shareholders must wait one to two years before they are permitted to sell their shares.
