The Nasdaq Composite fell on Monday during the first trading session of the second half of 2026 due to a semiconductor selloff.
This downturn is significant because it marks a shift in momentum for AI infrastructure stocks, which have served as primary drivers for the broader technology market throughout the year.
The Nasdaq Composite declined 0.66% [1] to close at 26,040.03 [1]. This slide was triggered by a sharp selloff in semiconductor and AI infrastructure stocks [1, 2].
Market analysts noted that the timing of the dip follows a period of significant growth. Seeking Alpha said, "Semiconductors put in a powerful performance in Q2 2026, which more than made up for what happened in Q1 2026" [2].
James Fingleton of The Bull said the index fell 0.66% to close at 26,040.03 today, marking the start of the second half of the year [1]. The volatility reflects a broader correction in the AI sector after the rapid gains seen earlier this year.
Investors are now monitoring whether the AI infrastructure sell-down is a short-term correction or a longer trend. The sector has seen extreme volatility since the beginning of the year, transitioning from a weak first quarter to a strong second quarter before this current decline.
“The Nasdaq Composite fell 0.66% to close at 26,040.03”
The decline suggests a period of profit-taking among investors following the surge in AI-related stocks during the second quarter of 2026. Because the Nasdaq is heavily weighted toward these technology firms, the index remains highly sensitive to shifts in semiconductor sentiment, indicating that the market's overall stability is currently tied to the perceived sustainability of AI infrastructure growth.
