World stocks drift lower ahead of Greek vote; Chinese stocks plunge as support measures fail

``CHINA SELL-OFF: A Chinese market rout deepened as investors dumped shares in spite of government measures this week aimed at restoring confidence, such as cutting fees and easing rules on borrowing money for trading. The China Securities Regulatory Commission, the market watchdog, said late Thursday that it's launching an investigation into suspected stock market manipulation, state media reported, in an indication of Beijing's efforts to halt the market slide.''