Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Walmart (WMT) downgraded to Perform from Outperform at Oppenheimer by analysts Rupesh Parikh and Brian Nagel, who said that while they remain "upbeat" on the retailer's strategic direction, they no longer see the case for Walmart outperformance and are "increasingly concerned" that the valuation at which shares trade could prove capped. 2. VMware (VMW) downgraded to Hold from Buy at Stifel by analyst Brad Reback, who sees "too much uncertainty" as parent Dell Technologies (DVMT) evaluates "potential business opportunities." He believes, however, that VMware continues to execute well following its "strong" Q4 results. 3. Ruth's Hospitality (RUTH) downgraded to Hold from Buy at Deutsche Bank by analyst Brett Levy, who said the company's progress and upside are largely priced in given the company's premium multiple, Levy tells investors in a research note. The analyst this morning also upgraded both Bloomin' Brands (BLMN) and Del Frisco's (DFRG) to Buy. 4. Opko Health (OPK) downgraded to Underweight from Neutral at JPMorgan by analyst Eric Joseph, who believes the company's Q4 miss raises "significant doubts" for the core diagnostics/ BRL business. He believes the stock will continue to see pressure going forward. 5. Pure Storage (PSTG) downgraded to Neutral from Positive at Susquehanna by analyst Mehdi Hosseini, who cited the lack of visibility, particularly around FlashBlade, to raise estimates from current levels, which would be necessary for the next leg of appreciation. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage,
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