(Yicai Global) July 29 -- China's mainland stock markets spiraled ever higher in the afternoon on the wings of securities brokerages and tech firms. Trade volume also sprang back in a display of reviving market confidence.

The Shanghai Composite Index closed 2.06 percent higher at 3,294.55. The Shenzhen Component Index finished at 13,557.44, up 3.12 percent. The ChiNext Price Index, which tracks growth enterprises in Shenzhen, rose 3.78 percent to 2,767.40.

The total trading volume of the two markets surpassed CNY1 trillion (USD142.9 billion) again after a two-day shrinkage. Turnover had been above that key figure for straight 17 days before that.

Brokers soared 4 percent at the close, led by Zhejiang province-based Caitong Securities [SHA:601108], which struck the 10 percent price ceiling to stop trading at CNY14.47 (USD2.07). Shares on the new sci-tech board, especially those of medical firms and chip makers, were also among the biggest gainers.

Editor: Ben Armour