shares of western digital corp wdc shot up 56 in afternoon trading wednesday toward a sixthstraight gain enough to make the data storage companys stock the biggest gainer among sp 500 spx components benchmark analyst mark miller said he believes the rally is being driven by south koreabased rival samsung electronics co ltds 005930 announcement that it had to temporarily adjust operations a its manufacturing facilities in xian china had to put its plant xian china as a result of the ongoing covid19 situation miller reiterated the buy rating hes had on western digitals stock since at least the past 2 12 years and kept his stock price target at 92 which implies a tk upside from current levels the stock which was headed for the highest close since aug 11 has soared 187 during its current win streak which would be the longest since the sixday stretch ended feb 19 the stocks rally wednesday comes as the spdr technology select sector xlk slipped 01 while the sp 500 inched up 01