Wall Street Journal | Oil Prices Tumble Nearly 8% Wall Street Journal Oil prices on Monday skidded to their biggest single-day declines in more than three months, as gyrations in Chinese stocks and the prospect of more crude from the U.S. and Iran revived worries about the global supply glut. China's stock markets have ... 5 big reasons for oil's plunge Monday Oil prices tumble, falls below $60 after Greece vote Oil prices crater, close at lowest level since mid-April |