NEW YORK ( TheStreet) -- CHANGE IN RATINGS Harte-Hanks ( HHS) was upgraded to buy at TheStreet Ratings. Microsoft ( MSFT) was upgraded at Nomura to buy. $38 price target. Shareholder activism could help unlock value, Nomura said. Precision Castparts ( PCP) was upgraded at Wells Fargo to outperform from market perform. Company can deliver 15% annual earnings growth over the next several years, Wells Fargo said. Regeneron ( REGN) was initiated with an outperform rating at Oppenheimer. $300 price target. Eylea should continue to grow and the company is expanding into DME, Oppenheimer said. SNTS) was downgraded at Leerink Swann to market perform from outperform. $26 price target. Valuation call, as the company trades at a sizable premium to its peers, Leerink Swann said. Sempra Energy ( SRE) was initiated with a buy rating at Keybanc. $100 price target. Company has a strong growth profile, including exposure to Latin America, Keybanc said. Speedway Motorsports ( TRK) was downgraded to hold at TheStreet Ratings. Tesla ( TSLA) was initiated with a hold rating at Stifel Nicolaus. Valuation call, as the company still has little evidence of customer retention or success at lower price points, Stifel Nicolaus said. VRTX) was initiated with an outperform rating at Oppenheimer. $105 price target. Cystic Fibrosis treatments can continue to drive growth, Oppenheimer said. Zynga ( ZNGA) was initiated with a hold rating at Benchmark. $2.98 price target. New management needs to show stabilized Web trends and material mobile acceleration, Benchmark said.