US Stocks Open Mixed: Philadelphia Semiconductor Index Falls Over 2%, Memory Chip Stocks Slide, Goldman Sachs Up 3%, Apple Hits Record High

The split between a firmer Dow and a weaker Nasdaq points to rotation rather than broad risk appetite, with the semiconductor complex — and memory names in particular — absorbing the selling while financials and mega-cap Apple attract bids. Goldman's equities-trading strength suggests capital-markets activity is holding up even as chip sentiment cools, a divergence worth watching. Whether memory weakness stays contained to that subsector or starts dragging the wider index is the open question.