Silver miners continue to have a brutal week, as yesterday's huge decline in silver prices is followed up by an even larger drop today. SLW -3.7%. CDE -4.4%. SSRI -3.4%. EXK -4.3%. But some copper miners are rebounding a little, even as the metal sheds another 3.4%. FCX +0.9%. SCCO +1.3%. BHP +0.7%.