12.05 pm: Tech stocks lead Monday's market selloff US stocks fell sharply in noon trading, as the benchmark 10-year Treasury yield rose once again to just under 1.5%.   At midday, the Dow fell 349 points to 33,987, while the S&P 500 lost 59 points at 4,298 and the tech-heavy Nasdaq dropped 323 points, or 2.2%, to 14,243.
US stocks slide midday as Treasury yields move higher