A single analyst's upgrade can excite a market; a trend of upgrades can lift it, which is lifting Carvana NYSE: CVNA—a trend in upgrades signaling a shift in sentiment and a sustainable rally for this stock. The upgrade trend is strong enough to put CVNA on MarketBeat’s list of Most Upgraded Stocks, which is significant because Carvana has been prominent on the list of Lowest Rated Stocks for many quarters. The takeaway is that this once stalled investment is rebounding, and the rebound is shifting into hig ...