Syrthiodd Stoc Pfizer 2.8%. A wnaeth Buddsoddwyr Gamddeall y Canllawiau Refeniw?

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Ffynhonnell: https://www.barrons.com/articles/pfizer-stock-fell-2-8-did-investors-misunderstand-the-revenue-guidance-51644354958?siteid=yhoof2&yptr=yahoo