US stocks rally broadly; Nasdaq leads with 1.69% gain

US equities closed sharply higher on Thursday, with the Nasdaq surging 1.69% and the S&P 500 up 1.14%, while European indexes also finished with gains. The broad-based advance suggests a risk-on session, though the specific drivers are not detailed in the report. This marks a continuation of recent market strength, but the lack of context limits the analytical depth.