Today's noteworthy upgrades include: DuPont (DD) upgraded to Outperform from Underperform at CLSA... Ennis (EBF) upgraded to Neutral from Underperform at Macquarie... Freeport McMoRan (FCX) upgraded on volume increases, deleveraging at Morgan Stanley... MercadoLibre (MELI) upgraded to Outperform from Neutral at Credit Suisse... NGL Energy Partners (NGL) upgraded to Outperform from Neutral at Baird... Newmont Mining (NEM) upgraded to Neutral from Underperform at BofA/Merrill... Rice Energy (RICE) upgraded to Buy from Accumulate at Global Hunter... RusHydro (RSHYY) upgraded to Neutral from Underweight at JPMorgan... ServiceSource (SREV) upgraded to Outperform from Market Perform at JMP Securities... UniCredit (UNCFF) upgraded to Buy from Hold at Deutsche Bank... Viacom (VIAB) upgraded to Buy from Neutral at UBS... Whiting Petroleum (WLL) upgraded to Accumulate from Neutral at Global Hunter... Windstream (WIN) upgraded to Buy from Neutral at Nomura.

Jefferies lowered the firm's price target on MercadoLibre to $1,400 from $1,650 and keeps a Hold rating on the shares. A recent ramp in investments could pressure EBIT near-term, though continued momentum in GMV, Advertising, and Credit "would keep the long-term story alive," the analyst tells investors in a preview note for the U.S. Internet group.

DZ Bank upgraded MercadoLibre to Buy from Hold with a $1,685 price target.