QQQ is trading 1.8% down on August 18, 2026, driven primarily by a sharp Treasury selloff and renewed U.S.-Iran tensions.
- The 30-year Treasury yield reached 5.3275% and the 10-year yield 4.74%, pressuring high-duration technology and growth valuations.
- Oil approached $91 per barrel as ceasefire and diplomatic prospects deteriorated, raising inflation concerns and reinforcing broad risk aversion.
- Nasdaq-100 futures were already down 1.21% before the open; semiconductor and mega-cap technology shares amplified the sector decline.