U.S. Market Daily: QQQ-Tracking ETF Gains as Semiconductor Leaders Advance
On September 18, 2026, the S&P 500-tracking SPY and Nasdaq-100-tracking QQQ rose, while the Dow-tracking DIA declined. Exchange breadth was mixed: decliners outnumbered advancers on the NYSE and Nasdaq, while the NYSE American showed a narrower positive average change. Nvidia and Micron were selected as market leaders; Netflix, Bloom Energy and Qualcomm were selected as issue stocks.
Market at a glance
SPY, the S&P 500-tracking ETF, closed at $763.26, up 0.34%. QQQ, the Nasdaq-100-tracking ETF, closed at $721.45, up 0.63%. DIA, the Dow-tracking ETF, closed at $515.88, down 0.25%.
Breadth was negative on the NYSE, where 778 stocks advanced, 1,451 declined and 623 were unchanged. Nasdaq-listed stocks also recorded more decliners than advancers, with 1,767 advancers, 2,176 decliners and 1,310 unchanged. On the NYSE American, 1,526 stocks advanced, 2,089 declined and 1,095 were unchanged.
Market leaders
Nvidia (NVDA), listed on Nasdaq, closed at $222.27, up 1.34% on the day and 1.82% over five trading days. Trading volume was 190.3 million shares, with turnover of $42.30 billion.
Micron Technology (MU), also listed on Nasdaq, closed at $1,015.80, up 3.92% on the day and 4.16% over five trading days. Volume was 35.8 million shares and turnover was $36.37 billion. Both companies were selected by the system as market leaders based on turnover.
Issue stocks
Netflix (NFLX) closed at $71.79, down 4.67% on the day and 7.25% over five trading days. Volume reached 114.4 million shares, or 4.32 times its 20-day average, with turnover of $8.21 billion.
Bloom Energy (BE) closed at $265.63, down 5.39% on the day and 3.67% over five trading days. Volume was 73.5 million shares, or 5.56 times its 20-day average, and turnover was $19.52 billion.
Qualcomm (QCOM) closed at $177.72, down 5.82% on the day and 2.34% over five trading days. Volume was 54.5 million shares, or 4.64 times its 20-day average, with turnover of $9.68 billion. These companies were selected as issue stocks based on the system’s turnover, volume and price-movement criteria.
Trading data note
The dataset contained valid daily price records for 12,815 stocks, with a 100% valid-stock ratio. Reported turnover figures are in U.S. dollars. Direct U.S. index data was not available, so SPY, QQQ and DIA are presented as market-reference ETFs rather than as the indexes themselves.
Next Trading Day Checkpoints
- Watch whether the contrasting moves in QQQ and DIA persist in the next completed U.S. trading session.
- Monitor breadth on the NYSE and among Nasdaq-listed stocks, where decliners outnumbered advancers on September 18.
- Track follow-through in Nvidia and Micron after their gains, and in Netflix, Bloom Energy and Qualcomm after their declines and elevated volume.
This article summarizes the supplied market data for September 18, 2026. The selected market leaders and issue stocks are system-selected categories, not recommendations or investment advice.