U.S., Chinese officials conclude contentious economic talks, steel stocks soar

By David Lawder and Lesley WroughtonWASHINGTON (Reuters) - Senior U.S. and Chinese officials concluded contentious economic talks on Wednesday but the outcome was clouded by the cancellation of closing news conferences and U.S. demands for a "more fair" trading relationship with Beijing.U.S. Treasury and Commerce Department officials declined immediate comment on the annual summer dialogue between Washington and Beijing, while the Chinese delegation's leader, Vice Premier Wang Yang, left the Tre