The gauges were probably moving in different directions because of Broadcom, which is in the S&P 500 and Nasdaq 100 but not the Dow. Its shares sank 4.5% in late trading, following a fourth-quarter earnings call in which analysts questioned the chip maker's sales forecasts and future margins. Stocks were struggling for direction on Friday, as investors tried to make sense of another set of so-so Big Tech earnings. Futures tracking the Dow Jones Industrial Average rose 106 points, or 0.2%, while contracts ti ...

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