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News Snapshot:

Check out the companies making headlines before the bell. Carvana — Shares gained more than 5% after RBC upgraded the stock to sector perform from underperform. The firm cited a reasonable valuation and a favorable setup for unit acceleration. MongoDB — Shares fell more than 8% after the company issued disappointing first-quarter and full-year guidance Thursday. Meanwhile, MongoDB beat fourth-quarter expectations. The database software maker posted adjusted earnings of 86 cents per share on revenue of $458 million. Analysts had called for earnings of 47 cents per share and $433 million in revenue, according to LSEG. DocuSign — The stock...