NEW YORK ( TheStreet) -- CHANGE IN RATINGS Air Products ( APD) was downgraded at Bank of America/Merrill Lynch to underperform from neutral. Valuation call, based on a $90 price target, BofA/Merrill said. Apollo Group ( APOL) was upgraded to hold at TheStreet Ratings. Centene ( CNC) was initiated with a buy rating at Lazard Capital Markets. $60 price target. Company will likely grow by entering new states, Lazard Capital Markets said. Garmin ( GRMN) was downgraded to hold at TheStreet Ratings. Humana ( HUM) was initiated with a neutral rating at Lazard Capital Markets. Valuation call, Lazard Capital Markets said. M) was initiated with a buy rating at Stifel Nicolaus. $55 price target. Company dominates the market and can achieve operating leverage, Stifel Nicolaus said. Trimble ( TRMB) was upgraded at Lazard Capital Markets to buy from neutral. $31 price target. Negative macro headlines have created a more attractive entry point, Lazard Capital Markets said. Zoetis ( ZTS) was upgraded to outperform from market perform at BMO Capital. $36 price target. 400 million new shares are hitting the market and any weakness should be seen as a buying opportunity, BMO Capital said.