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Tower Semiconductor Stock Exploded—Has The Market Gone Too Far?

Tower Semiconductor has become one of the semiconductor market’s most dramatic momentum stories after announcing a major expansion of its manufacturing operations in Japan. The company plans to invest $3 billion to increase production capacity, supported by a $1 billion grant from the Japanese government. The announcement sent its U.S.-listed shares up more than 18% in premarket trading, extending a rally that had already lifted the stock by over 95% since the beginning of the year. The project will focus primarily on silicon photonics and silicon germanium chips used in high-speed data transmission, fiber-optic networks, cellular systems, and artificial intelligence infrastructure. Tower also upgraded its 2028 financial outlook, targeting $3.6 billion in revenue and $1.2 billion in net profit, compared with its previous targets of $2.8 billion and $750 million, respectively.