NEW YORK ( TheStreet) -- These eight companies hit 52-week highs on Wednesday: Wal-Mart ( WMT), Union Pacific ( UNP), Comcast ( CMCSK), WellCare Health Plans ( WCG), Alexion Pharmaceuticals ( ALXN), AutoZone ( AZO), Arthur J Gallagher ( AJG) and IAC/InterActiveCorp ( IACI). Each of the stocks received a buy rating from TheStreet Ratings. Wal-Mart "Despite trading in a range over the last 12 years, we believe 2012 could be a break-out year for WMT stock," Bank of America Merrill Lynch analysts wrote in a report on Wednesday. The analysts noted that Wal-Mart's U.S. same-store sales are slated to continue improving and that "Walmart is positioning for successful e-commerce globally." Shares of Wal-Mart hit a 52-week high of $62.48 on Wednesday. The stock's 52-week low of $48.31 was set on Aug. 10. TheStreet Ratings gives Wal-Mart an A- grade with a $70.42 price target. The stock has risen 4.32% year to date.