Fresh anxieties about China’s commitment to steadying the stock market sparked heavy losses in Shanghai Tuesday, despite signals of a housing recovery and the central bank’s latest steps to keep cash from fleeing. The Shanghai Composite Index tumbled 6.2% to 3748.16, just 240 points above its recent trough on July 8 and 27% off its June peak. The smaller Shenzhen Composite Index fell 6.6% to 2174.42. In Hong Kong, shares fell 1.4%, turning negative for the year, and a gauge of Chinese companies listed in the city fell 1.8%. Losses among stocks of state-owned enterprises in Shanghai started building earlier in the morning amid skepticism about Beijing’s commitment to reform . Reports of efforts to accelerate reform, long touted as a way to open up bulky conglomerates to private investment and market forces , had gained momentum in recent weeks and buoyed related stocks. “At 2 p.m. it started […]