RIO TINTO (RIO $53.18, rating lowered to UNDERWEIGHT from NEUTRAL, price target cut to $39 from $45) HIGHER ESTIMATED NET DEBT, EMPLOYEE POSTRETIREMENT and OTHER PROVISIONS LOWER VALUATION 9/16/2012

RIO TINTO (RIO $53.18, rating lowered to UNDERWEIGHT from NEUTRAL, price
target cut to $39 from $45) HIGHER ESTIMATED NET DEBT, EMPLOYEE POSTRETIREMENT
and OTHER PROVISIONS LOWER VALUATION 9/16/2012