HONG KONG (MarketWatch) -- Hong Kong shares skidded sharply in initial trading Monday, with weak U.S. jobs numbers and Hungary's fiscal woes curbing risk-appetite and resulting in a sell-off fronted by commodity and banking stocks. The Hang Seng Index tumbled 2.5% to 19,288.08 and the Hang Seng China Enterprises Index gave up 3% to 11,032.32. Shares of Aluminum Corp. of China Ltd. /quotes/comstock/22h!e:2600 (HK:2600 5.90, -0.40, -6.35%) /quotes/comstock/13*!ach/quotes/nls/ach (ACH 19.14, -1.01, -5.01%) plunged 5.7% and PetroChina Co. /quotes/comstock/22h!e:857 (HK:857 8.10, -0.43, -5.04%) /quotes/comstock/13*!ptr/quotes/nls/ptr (PTR 106.31, -3.89, -3.53%) sank 3.6%, with HSBC Holdings PLC /quotes/comstock/22h!e:5 (HK:5 70.80, -2.70, -3.67%) /quotes/comstock/13*!hbc/quotes/nls/hbc (HBC 45.30, -1.26, -2.71%) shrinking 3.5%.