Nebius stock fell nearly 3% on its first full trading day as a Nasdaq-100 constituent, caught in a broad tech selloff that sent the Nasdaq composite down more than 2% as investors retreated from high-flying AI and semiconductor shares.
Nebius Group was added to the Nasdaq-100 Index effective June 22, 2026, alongside CoreWeave, Astera Labs, Rocket Lab, and Teradyne as part of the index’s June quarterly rebalance. The inclusion reflected the index’s shift toward AI infrastructure and cloud computing companies, according to reporting from Yahoo Finance and Nasdaq’s official announcement on June 11, 2026.
The AI cloud infrastructure provider had surged ahead of the inclusion announcement. Nebius shares rose 11.5% on June 15 following news of the Nasdaq-100 addition, and climbed 23.97% from their June 11 close of $222.24 to $275.50 by June 23, according to Yahoo Finance. However, the gains proved difficult to sustain as the broader tech sector weakened.
The pullback reflected a pattern seen across newly added index constituents. CoreWeave, which also joined the Nasdaq-100 on the same date, fell 5% on its debut day as traders sold into massive year-to-date gains, according to 24/7 Wall St. Both stocks had benefited from surging investor demand tied to their exposure to AI data-center buildout and infrastructure spending.
The tech selloff that caught Nebius was part of a wider market retreat in late June. The Nasdaq Composite shed 580 points, or 2.2%, on June 23 alone, marking a second straight day of losses driven by concerns over AI spending sustainability and rising interest rates, according to Yahoo Finance reporting from that period. Reuters described the selloff as stirring bubble fears in the US stock market, with analysts pointing to stretched valuations in semiconductor and AI stocks that had rallied sharply earlier in 2026.
Nebius had been one of the year’s strongest performers before the selloff, with the stock up 175% year-to-date as of late June, according to Investing.com. The company had posted Q1 2026 revenue of $399 million and raised its 2026 capital spending guidance to $20 billion to $25 billion to expand capacity, according to Zacks Investment Research reporting from July 1, 2026.
Sources
- Perplexity — Confirmed Nebius fell nearly 3% on its first full trading day as a Nasdaq-100 constituent amid AI-driven tech selloff
- Yahoo Finance — Reported Nebius finished at $275.50 on June 23 (up 23.97% from June 11 close) and that Nebius and CoreWeave fell after Nasdaq-100 listing
- Nasdaq — Announced five companies added to Nasdaq-100 on June 11, 2026, effective June 22
- 24/7 Wall St. — Reported CoreWeave fell 5% and Nebius dipped on Nasdaq-100 debut day with traders selling into massive YTD gains
- Reuters — Covered tech selloff stirring bubble fears in US stock market on June 30, 2026
- CNBC — Reported global stocks sold off on June 23, 2026, led by deep losses for tech stocks
- Washington Post — Reported Nasdaq closed down more than 2% as global tech sell-off deepened
- Yahoo Finance (June 23 reporting) — Stated tech-heavy Nasdaq Composite shed 580 points, or 2.2%, marking second straight day of losses
- Investing.com — Reported Nebius stock had risen nearly 175% year to date in 2026
- Zacks Investment Research — Reported Nebius raised 2026 capital spending to $20B-$25B and reaffirmed 2026 revenue guidance on July 1, 2026
