Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Cabot Oil & Gas (COG) upgraded to Outperform from Neutral at Macquarie with analyst Paul Grigel saying the pullback in shares is overdone and expects improved Natural Gas prices into the fall and tighter Marcellus differentials. 2. Dunkin' Brands (DNKN) upgraded to Buy from Hold at Argus with analyst John Staszak saying that the company, unlike most restaurant chains he covers, has "strong opportunities to expand its brand both in the U.S. and internationally." 3. bluebird bio (BLUE) upgraded to Outperform from Market Perform at BMO Capital with analyst Matthew Luchini saying that a trial of the company's bb2121 drug showed that its efficacy is "compelling," while its safety is "generally clean." 4. Paccar (PCAR) upgraded to Buy from Neutral at UBS with analyst Steven Fisher saying he expects truck production to inflect positively in the next 12 months, which should drive upside to earnings estimates. 5. Tenet (THC) upgraded to Outperform from Market Perform at Wells Fargo with analyst Gary Lieberman saying the sale of additional hospitals to HCA Holdings (HCA) could drive shares up 30%-40%. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage,
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