Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. 3M (MMM) downgraded to Hold from Buy at Jefferies with analyst Laurence Alexander saying he sees less room for multiple expansion in a rising interest rate environment and feels the risk/reward "looks increasingly challenging at this point." 2. Vipshop (VIPS) downgraded to Sector Weight from Overweight at KeyBanc with analyst Hans Chung saying he sees uncertainties around Tencent (TCEHY) and JD.com (JD) contributions ahead, which drove high expectations for the top-line growth and multiple expansion, and sees margin pressure likely to continue driven by sector competition and the company's hike in marketing expenses to grow new customer organically. 3. PPG (PPG) downgraded to Hold from Buy at Jefferies with analyst Laurence Alexander saying persistent concerns over pricing lagging higher oil-derived raw material costs, end market risk and the reliance on buybacks to protect earnings growth could "easily" move PPG's relative multiple to 10%-15% below the market over the next two years. 4. BT Group (BT) downgraded to Market Perform from Outperform at Bernstein. 5. F5 Networks (FFIV) downgraded to Neutral from Buy at DA Davidson with analyst Mark Kelleher saying the positive factors working in the company's favor, such as its ongoing new iSeries product cycle, high gross margins, strong cash flows, and the application of it security solutions have become increasingly more evident after its last earnings report and have since been reflected in the valuation on the stock. 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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