Stocks to watch at close on Wednesday STOCKS to watch on the Australian stock exchange at close on Wednesday: The Australian Federal Police and US authorities are investigating bribery allegations surrounding BHP Billiton's sponsorship of the Beijing Olympics. National Australia Bank is shrinking its branches and increasing self-service as it aims to save about $800 million a year and win customers from its rivals. FXJ - FAIRFAX MEDIA LTD - down two cents at 62 cents News Ltd boss Kim Williams says the newspaper publishing giant will consider a legal challenge to the government's planned media reforms. Qantas says a possible strike by hundreds of security screeners at Melbourne Airport over Easter won't have an impact on flights.