The Nasdaq Composite Index on Thursday logged its first all-time high since July. The technology-laden gauge closed up 1% at 6,428.66, a fresh closing record and its first since July 26, according to FactSet data.
The Nasdaq Composite finished the week up 2.7%, lifted by a 8% rise in the Nasdaq Biotechnology Index in the period. Biotech shares soared following the Food and Drug Administration's approval of the first gene therapy in the U.S.
All three major US stock indices opened at fresh lifetime highs on Monday as investors moved to snap up riskier assets amid easing tensions with North Korea and as the markets wait for the latest Federal Reserve meeting on Wednesday.