China's markets may fall further as Olympics near Higher inflation means more tightening; U.S. market fallout causing pressure By Moming Zhou & Lisa Twaronite, MarketWatch Last update: 12:01 a.m. EDT March 27, 2008 SAN FRANCISCO (MarketWatch) -- China's already battered stock markets could tumble further against a darkening economic backdrop ahead of August's Olympics Games, as the U.S. recession begins to take its toll and China further tightens its monetary policies to combat runaway inflation. After quintupling in just two years, China's benchmark Shanghai Composite Index has plunged 40% since peaking at an all-time high in October, confounding the expectations...