RIO TINTO (RTP $158, rated OVERWEIGHT target $236); RAISING ESTIMATES ON INCREASED COPPER PRICE FORECAST, LOWER COST ESTIMATES FOR ALUMINA, AND CONTINUED BALANCE SHEET IMPROVEMENT 4/30/2009

RIO TINTO (RTP $158, rated OVERWEIGHT target $236); RAISING
ESTIMATES ON INCREASED COPPER PRICE FORECAST, LOWER COST
ESTIMATES FOR ALUMINA, AND CONTINUED BALANCE SHEET
IMPROVEMENT 4/30/2009