Beijing says it will stop buying U.S. agricultural products

China's central bank has fixed the yuan's central parity rate at 6.9996 per U.S. dollar. That's weaker than the level set on Tuesday, when the yuan hit an 11-year low. Shares in Asia fell for an eighth straight session on Wednesday. But, signs that China is stepping in to steady the yuan have helped ease investors' fears of a possible global currency war.