BEIJING — Locked shares worth about 84.2 billion yuan ($12.8 billion) will become eligible for trading on the Shanghai and Shenzhen stock exchanges?this week.

This is 591.7 percent higher than last week, according information service provider Wind.

Locked shares from 46 listed companies will become tradable from Sept 25 to 29, it said.

Under China's market rules, major shareholders must wait one to two years before they are permitted to sell their shares.

Chinese stocks closed lower Friday, with the benchmark Shanghai Composite Index down 0.16 percent to close at 3,352.53 points.

The stock market has been bullish since September, holding firmly above the 3,300-point mark, a level previously seen as showing strong resistance.