First Solar is trading at $169.32, down 4.28%, as investors weigh softer sales and reduced 2026 guidance despite an earnings beat. - October 29 results beat earnings expectations, but sales of $1.23 billion missed forecasts and fell 23% year over year. - Management cut 2026 revenue guidance to $4.6 billion–$4.9 billion from $4.9 billion–$5.2 billion, and lowered expected volume. - The company also authorized a $500 million buyback.