Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Advance Auto Parts (AAP) upgraded to Buy from Hold at Jefferies with analyst Bret Jordan saying the 39% year-to-date share selloff creates an attractive risk/reward. 2. QuintilesIMS (Q) upgraded to Neutral from Underperform at Baird with analyst Eric Coldwell saying he is "incrementally positive" on the company's positioning and strategy. 3. Arena Pharmaceuticals (ARNA) upgraded to Outperform from Market Perform at JMP Securities with analyst Jason Butler saying the stock's valuation does not adequately reflect the chances of success of its two lead drugs, ralinepag in pulmonary arterial hypertension and etrasimod in ulcerative colitis. 4. Palo Alto Networks (PANW) upgraded to Buy from Neutral at Citi with analyst Walter Pritchard saying that after six quarters of estimates cuts, management "has gotten ahead of negative revisions" and fiscal 2018 offers an "even set-up on numbers." 5. Spark Energy (SPKE) upgraded to Buy from Neutral at Guggenheim. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.