US midday market brief: S&P 500 flat as Nvidia, Micron-led chip rally offsets losses
The S&P 500 opened 2026 treading water, with semiconductor stocks, particularly Nvidia and Micron, muscling higher to counterbalance weakness across tech names. The blue-chip Dow inched into positive territory while the Nasdaq slipped roughly 0.2% to 0.3%, painting a classic picture of sector rotation rather than broad confidence. For traders timing the year’s opening moves,
