Here are today's top Wall Street analyst ratings where finbox.io's unbiased fair value estimates support the recommendation.Top Upgrades and Buy Ratings JPMorgan Chase reiterated Fresenius Medical Care (NYSE:FMS) at Buy. Shares currently have 20% upside.Citigroup upgraded Vectren Corp. (NYSE:VVC) from Neutral to Buy. Nine valuation models imply a fair value of $59 per share implying the stock is currently 13% undervalued.Continue reading on our blog.