Investing.com - A sharp sell-off in Chinese shares dragged world stock markets lower and boosted the safe-haven yen on Wednesday. Tuesday's weak Chinese trade figures and slide in oil prices have revived global growth concerns. European shares opened higher but held below recent one-month highs. The euro was also lower ahead of the European Central Bank's policy meeting on Thursday. Most analysts expect the ECB to cut its deposit rate again and expand its asset-buying program.