SA analyst upgrades/downgrades: GOOG, MSFT, NBIS, MU

[Close-up of woman trading stock online on mobile phone] Micron Technology (MU [https://seekingalpha.com/symbol/MU]) receives a notable upgrade to Strong Buy following strong Q4 2026 earnings and improved revenue visibility through multi-year customer commitments. Nebius Group N.V. (NBIS [https://seekingalpha.com/symbol/NBIS]) also earns an upgrade as its recent selloff creates an attractive entry point despite sector-wide concerns about neocloud debt levels. On the downside, Alphabet Inc. (GOOG [https://seekingalpha.com/symbol/GOOG]) faces a tactical Sell rating ahead of earnings as analysts flag early signs of organic traffic slowdown and potential cloud margin compression. Microsoft Corporation (MSFT [https://seekingalpha.