SHANGHAI, June 5 Reuters The Shanghai and Shenzhen stock exchanges are considering suspending certain valueadded market data feeds to institutions such as computerdriven quant funds, two sources said in an effort by Chinese regulators to tighten scrutiny of a sector blamed for contributing to market volatility.

The bourses may suspend providing granular transaction details including socalled tickbytick data, one of the sources said.

Such data is essential for quant funds, especially those using highfrequency trading HFT strategies that use computers programs to profit from tiny and fleeting market fluctuations.

China39;s securities regulator have tightened supervision of quant funds, saying they could contribute to market volatility, while blaming some for commanding unfair advantages over retail investors.

Last month, China published rules aimed at sharpening the oversight of program and highfrequency trading.

The stock exchanges39; planned move is like blindfolding quant funds to make the market fairer, creating a level playground for retail investors, the source said.

The China Securities Regulatory Commission CSRC and the two exchanges did not immediately respond to Reuters39; requests for comment.

Reporting by Shanghai Newsroom and Beijing Newsroom; editing by Jason Neely

Source Reuters