NEW YORK ( TheStreet) -- CHANGE IN RATINGS Apple ( AAPL) was downgraded at BTIG Research from Buy to Neutral. Valuation call, as postpaid wireless growth may not be sustainable, BTIG said. AVEO Pharmaceuticals ( AVEO) was downgraded to sell at TheStreet Ratings. Evercore Partners ( EVR) was downgraded from Buy to Neutral at Bank of America/Merrill Lynch. $31 price target. Estimates were also cut, given a lower sales pipeline, BofA/Merrill said. F5 Networks ( FFIV) was downgraded from Buy to Hold at Stifel Nicolaus. Valuation call. Genco Shipping & Trading ( GNK) was downgraded to sell at TheStreet Ratings. Helmerich & Payne ( HP) was upgraded at Guggenheim from Neutral to Buy. $70 price target. Estimates also boosted, given higher expected utilization and dayrates, Guggenheim said. LinkedIn ( LNKD) was initiated with a Hold rating at Needham. Valuation call. Molina Healthcare ( MOH) was downgraded at Cantor Fitzgerald from Buy to Hold. Valuation call, as the company lost out in the Ohio Medicaid contract, Cantor said. SBA Communications ( SBAC) was upgraded at Citigroup to Buy from Neutral. $60 price target. Recent transactions create a surprising valuation discount, Citi said. Tyco ( TYC) was upgraded at Argus Research from Hold to Buy. $65 price target. Pentair deal should help both companies, Argus said.