Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. BorgWarner (BWA) upgraded to Buy from Neutral at Goldman Sachs with analyst David Tamberrino saying he believes the company will outperform supplier peers late in the North American auto cycle. 2. Norfolk Southern (NSC) upgraded to Buy from Neutral at Citi with analyst Christian Wetherbee stating that he sees solid upside to consensus estimates and the potential for multiple appreciation based on "sustainably better" free cash flow. 3. Quest Diagnostics (DGX) upgraded to Overweight from Equal Weight at Barclays with analyst Jack Meehan citing the company's "very favorable" risk-reward profile and current levels. 4. Ciena (CIEN) upgraded to Overweight from Equal Weight at Morgan Stanley with analyst Meta Marshall saying recent meetings with management give her confidence that revenue momentum can persist at least for the next year. 5. Microsoft (MSFT) upgraded to Overweight from Neutral at Atlantic Equities with analyst James Cordwell stating the company has successfully managed the cloud transition, while expanding its addressable market, and should now be a primary beneficiary of enterprises undertaking digital transformations. 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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