Another boomer that has surged close to 100% within the past one month or so is Spreadtrum Communications ( SPRD). The fabless semiconductor company continued its strong run this week as well, piling on another 20.6%. The stock witnessed a host of rating revisions over the week in view of the bullish sentiment for the ticker. Indian ADRs were not far behind. The entire IT pack comprising Satyam Computer Services ( SAY) (+10.9%), Cognizant Technology Solutions ( CTSH) (+8%), Wipro ( WIT) (+7.6%), iGate Corp ( IGTE) (7%), and Infosys Technologies ( INFY) (+5%) registered impressive gains. Indian mining major Sterlite Industries' ( SLT) stock was up 7.8% during the week. The stock closed 6% higher in trade on the Indian market on Friday. Nonetheless, Brazilian mining majors Rio Tinto ( RTP), Vale SA ( VALE) and Companhia Siderurgica Nacional ( SID) gained 18.7%, 14.9%, and 14.6%, respectively.