At least four companies reported earnings last week. Merck KGaA (Xetra:MRK) was essentially unchanged for the week despite beating the Street's EPS and revenue estimates. On Thursday, the company gained 1% following its earnings release in which it also announced raising its 2012 revenue guidance, saying it "expects the markets for pharmaceuticals as well as over-the-counter drugs to grow, driven by volumes in emerging markets." The Euro Stoxx 50, a measure of blue chip eurozone stocks, was off 2% last week on continued concerns related to the region's debt crisis. Chinese supplier Wuxi PharmaTech Inc. (NYSE:WX) was up 7% after beating