Hong Kong stocks closed down 135. 18 points, or 0.67 percent, at 19,912.82 on Thursday. The benchmark Hang Seng Index traded between 20,159.29 and 19, 799.49. Turnover totaled 64.1 billion HK dollars (about 8.22 billion U.S. dollars). (1 U.S. dollar = 7.795 HK dollars)