Stocks flounder as bears tighten grip

Tumbling market prompts six companies to indicate they are at 'warning threshold'

The A-share market's losing streak on Thursday has led to growing concerns about forced sales of shares that have been pledged by major shareholders as collateral for more liquidity.

The benchmark Shanghai Composite Index suffered another blow on Thursday by falling 2.92 percent to close at 2,655.66 points, extending the total loss to 10 percent in just three days.