Broadcom said Monday it has agreed to expand its partnership with Apple through 2031 to develop and supply custom chips, a move that eased concerns about the iPhone maker's reliance on the chipmaker and sent Broadcom shares up nearly 4% in premarket trading.

It is important to note that Broadcom has been supplying Apple with vital components, including RF chips that are used for cellular, Wi-Fi, and Bluetooth connectivity, as well as other........

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