A sign is posted in front of a Broadcom office in San Jose, California, on Dec. 12, 2024.Justin Sullivan | Getty ImagesShares of Broadcom popped more than 21% Friday morning, pushing the company's market cap beyond $1 trillion for the first time. It will be Broadcom's best trading day on record if the move holds until the closing bell.The move comes after the company reported fourth-quarter results that beat Wall Street's expectations for earnings and showed strong artificial intelligence revenu...