Market Updates: Medco Health Solutions (NYSE:MHS), Dell (NASDAQ:DELL), 3Par (NYSE:PAR), Goldman Sachs Group (NYSE:GS)

Pharmacy benefits manager Medco Health Solutions (NYSE:MHS) says it will buy United BioSource Corp., which develops technology used in clinical trials and patient monitoring, for $730 million in cash. United BioSource is based in Bethesda, Md., and designs phone and web technologies that clinical trial patients can use to provide information about their health. That information is used in post-approval research. The companies say United BioSource will report about $280 million in revenue in 2010. The deal is expected to close in the third quarter and to add slightly to Medco’s profit in 2011. Medco is the largest pharmacy benefits manager in the U.S., but in recent years it has expanded its ability to do research and compare the effectiveness of different drugs. –Daily Finance Dell (NASDAQ:DELL) announced that…