Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Chipotle (CMG) upgraded to Hold from Sell at Stifel with analyst Chris O'Cull saying that his opinion of the company's fundamentals has not changed, but sentiment has improved and he believes investor optimism will likely outweigh fundamentals in the near-term. 2. Hyatt (H) and Marriott (MAR) were upgraded to In Line from Underperform at Evercore ISI. 3. Flowserve (FLS) upgraded to Sector Perform from Underperform at RBC Capital with analyst Deane Dray citing his expectations of an announcement of a turnaround plan from the new CEO and believes the stock may have bottomed, since the fourth quarter operating miss and "low-balled fiscal 2018 outlook" did not produce new selling pressure. 4. UPS (UPS) upgraded to Buy from Hold at Edward Jones. 5. Universal Display (OLED) upgraded to Buy from Hold at Needham with analyst James Ricchiuti saying he has been looking for the right entry point on the stock since the summer, and the recent 25% selloff from the high offers that opportunity. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.

Gabelli analyst Hendi Susanto upgraded Universal Display (OLED) to Buy from Hold, as he views the negative market response to a Bloomberg report that Apple (AAPL) is designing and producing MicroLED display prototypes as an overreaction and a buying opportunity. He believes that it is premature to have conviction that MicroLED, which Apple is working on, has reached a stage where it will be a formidable competing display technology to organic LEDs, or OLED, and active matrix OLED, or AMOLED, displays.

Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Universal Display (OLED) upgraded to Buy from Hold at Gabelli with analyst Hendi Susanto saying he views the negative market response to a Bloomberg report that Apple (AAPL) is designing and producing MicroLED display prototypes as an overreaction and a buying opportunity. 2. Oneok (OKE) upgraded to Buy from Hold at Jefferies with analyst Christopher Sighinolfi saying he is confident in Oneok's ability to hit target returns on $4.2B of its current projects following a recent meeting with management. 3. PPG (PPG) upgraded to Buy from Hold at Deutsche Bank with analyst David Begleiter saying he believes the company's capital deployment and "valuation discount" are attractive. 4. Roku (ROKU) upgraded to Perform from Underperform at Oppenheimer with analyst Jason Helfstein upgraded Roku (ROKU) to Perform citing valuation and the company's opportunity in virtual multichannel video programming distribution. 5. Arena Pharmaceuticals (ARNA) upgraded to Buy from Hold at Needham with analyst Alan Carr citing the company's "impressive results" from its Phase 2 Ulcerative Colitis study, noting that the the safety and tolerability data components are also "encouraging." This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.