April 11, 2012 (Chinavestor) Investors remained risk aware in Hong Kong on Wednesday sending the Hang Seng Index (INDEXHANGSENG:.HSI) 215.6 points or 1.1% lower for the day. Hong Kong indexes have followed U.S. counterparts very closely given Hong Kong's exposure to international fund flows. But investors in Shanghai maintained a positive attitude after Tuesday's big market day, sending the Shanghai Composite Index (SHA:000001) 3.1 points or 0.1% higher for the day. Investors liked China's surprise March trade surplus after a record deficit in February. Real estate and metal stocks led the advance in Shanghai but shipping lanes fell hard in Hong Kong where high oil prices and a weak European export market hurt the sector. China COSCO (HKG:1919) fell 5.1% in line with smaller China Shipping Development (HKG:1139) and CSCL (HKG:2866). China Eastern Airlines (HKG:0670) fell 4.4%, the fifth most among 42 components of the Hang Seng Index (INDEXHANGSENG:.HSI). High oil prices are hurting airliners globally with no exception for China Eastern Airlines (NYSE:CEA).