Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Ameren (AEE) upgraded to Neutral from Sell at Goldman Sachs with analyst Michael Lapides saying he sees Ameren's earnings rising 10% year-over-year in 2020 as 700MW of wind generation gets added to Union Electric's rate base. 2. GDS Holdings (GDS) upgraded to Neutral from Underperform at Credit Suisse. 3. Nordstrom (JWN) upgraded to Buy from Hold at Deutsche Bank with analyst Paul Trussell saying he views the 10% pullback in shares since the retailer's Q1 results as overdone. 4. Freeport McMoRan (FCX) upgraded to Buy from Neutral at B. Riley FBR with analyst Lucas Pipes saying Rio Tinto's (RIO) reported $3.5B deal with Indonesia for its interest in the Grasberg copper and gold mine sets an "attractive valuation marker" for Freeport. 5. Celgene (CELG) upgraded to Outperform from Market Perform at Bernstein with analyst Aaron Gal citing valuation. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.