On The Fly: Analyst Upgrade Summary Today's noteworthy upgrades include: 3M (MMM) upgraded to Outperform from Neutral at Credit Suisse... ACE Limited (ACE) upgraded to Buy from Neutral at Goldman... Applied Materials (AMAT) upgraded to Buy from Outperform at CLSA... Autoliv (ALV) upgraded to Sector Perform from Underperform at RBC Capital... Bed Bath & Beyond (BBBY) upgraded to Market Perform at Telsey Advisory... Box (BOX) upgraded to Buy at Canaccord... Chevron (CVX) upgraded to Peer Perform from Underperform at Wolfe Research... CyberArk (CYBR) upgraded to Buy from Neutral at Nomura... Exelon (EXC) upgraded to Buy from Neutral at Guggenheim... General Growth (GGP) upgraded to Outperform from Market Perform at BMO Capital... Intel (INTC) upgraded on positive checks, developments at JMP Securities... KLA-Tencor (KLAC) upgraded to Outperform from Underperform at CLSA... Lam Research (LRCX) upgraded to Buy from Outperform at CLSA... Marvell (MRVL) upgraded to Buy from Hold at Craig-Hallum... Nike (NKE) upgraded on share gains at Sterne Agee CRT... Spirit Airlines (SAVE) upgraded to Outperform from Market Perform at Cowen... United Rentals (URI) upgraded to Neutral from Underperform at BofA/Merrill.