Hong Kong stocks plunged 1,057.17 points, or 5.28 percent, to close at 18,957.26 on Thursday, tracking losses in the global markets. Bank of China sank 5.3 percent to 2.70 HK dollars (about 0.35 U.S. dollars), while ICBC retreated 9.1 percent to 4.72 HK dollars. HSBC was down 8.8 percent to 61.95 HK dollars, and Chueng Kong Holdings fell 5.4 percent to 91.75 HK dollars.