NEW YORK ( TheStreet) -- CHANGE IN RATINGSAmpco-Pittsburgh ( AP) downgraded to hold at TheStreet Ratings. BP ( BP) downgraded to hold at TheStreet Ratings. Brocade ( BRCD) downgraded at ThinkEquity from Buy to Hold, ThinkEquity said. $5 price target. Company is facing intense competition and get 24% of sales from Europe. Comerica ( CMA) upgraded at Stifel from Sell to Hold, Stifel Nicolaus said. Valuation call. Fusion-IO ( FIO) upgraded at Sterne Agee to Buy, Sterne Agee said. $24 price target. Company has pulled back to an attractive level and has positive, near-term growth drivers. Marvell Technology ( MRVL) upgraded at JMP from Underperform to Market Perform, JMP Securities said. Valuation call, despite recent weakness. Vail Resorts ( MTN) rated new Buy at Keybanc. Valuation call, based on a $60 price target. Navistar ( NAV) downgraded at Baird from Outperform to Neutral, Robert Baird said. $31 price target. Company faces numerous headwinds to growth. Piedmont Natural Gas ( PNY) upgraded at Baird from Neutral to Outperform, Robert Baird said. $33 price target. Company has invested into infrastructure and can generate above-average earnings growth for several years. Portland General ( POR) rated new Buy at Deutsche. $27.50 price target. Company is trading at a discount to its peers, but can deliver above-average growth. Zions Bancorporation ( ZION) upgraded at DA Davidson to Buy from Neutral, DA Davidson said. $22 price target. Pullback provides opportunity despite economic uncertainty.
STOCK COMMENTS / EPS CHANGES
Altera ( ALTR) numbers lowered at UBS. Shares of ALTR now seen reaching $40, UBS said. Estimates also lowered as weaker macro is likely to mute the recovery. Buy rating. Auxilium Pharma ( AUXL) target raised at Jefferies to $30, Jefferies said. Good buying opportunity on positive Peyronie's data. Buy rating. Salesforce.com ( CRM) estimates lowered at UBS through 2014, UBS said. Details emerge on Buddy media acquisition. Buy rating and $190 price target. Salesforce.com estimates reduced at BMO through 2014, BMO Capital said. Buddy Media purchase will cut into earnings. Outperform rating and $170 price target. Dollar General ( DG) estimates increased at Morgan Stanley through 2014, Morgan Stanley said. Higher sales and productivity are driving wider margins. Equal-weight rating.