ANTOFAGASTA PLC (ANFGF $20.60, RATING LOWERED TO NEUTRAL, Price Target Cut to $24 from $30) PRICE TARGET CUT DUE TO HIGHER FORWARD CAP EX ESTIMATES FOR NOKOMIS IN MN; 2011 EARNINGS ESTIMATE REDUCED DUE TO $300 MILLION IN LOSSES AS A RESULT OF PROVISIONALLY PRICED SALES; 2012 PRODUCTION AND COST GUIDANCE INCORPORATED 2/21/2012