S&P 500 rises 0.7% to fresh intraday high; Nasdaq 100 gains 1.5%

The absence of a named catalyst is itself the notable detail: a fresh intraday high on the S&P 500 with the Nasdaq 100 outpacing it points to tech-led momentum rather than a single headline event driving the tape. The breadth of the advance matters more than the index levels, since it suggests participation beyond a narrow leadership group. Whether the tech-heavy index keeps outrunning the benchmark, and whether a clearer catalyst emerges to explain the move, is the open question worth watching.