S&P 500 Most Active Stocks Week 39: Which Securities Show Highest Volume on September 25
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Key Takeaways
- Intel led the most-traded S&P 500 stocks on September 25, 2026 with a trading volume of 61.13 million shares, while the stock declined by 2.34 percent.
- Nvidia recorded the second-highest volume with 49.18 million shares traded and gained 0.11 percent.
- Super Micro Computer achieved the third-highest volume with 35.55 million shares traded and rose 3.79 percent.
- The S&P 500 closed on September 25, 2026 0.51 percent higher at 7,743.41 points, after gaining 0.6 percent for the entire trading week.
- Micron Technology drove the semiconductor sector on September 26, 2026 with a rise of 1.4 percent to 1,082.80 US dollars, supported by increased demand for high-performance memory chips for AI applications.
- Microsoft recorded a trading volume of 25.29 million shares on September 25, 2026 with a gain of 3.69 percent.
Intel led the most-traded S&P 500 stocks on September 25, 2026 with a trading volume of 61.13 million shares. The semiconductor manufacturer's stock declined by 2.34 percent. The S&P 500 closed on this Friday 0.51 percent higher at 7,743.41 points.
Nvidia and Super Micro Computer with High Volumes
Nvidia recorded the second-highest volume among S&P 500 stocks with 49.18 million shares traded. The graphics card and AI chip manufacturer gained 0.11 percent on September 25, 2026. On the following trading day, Nvidia continued this trend with a further gain of 0.2 percent and maintained its position as a market bellwether with massive trading volume in US dollars.
Super Micro Computer achieved the third-highest volume with 35.55 million shares traded. The server manufacturer's stock rose 3.79 percent on September 25. Tesla followed with 34.16 million shares traded but declined by 1.28 percent.
Microsoft and Nike Among Top Volume Securities
Microsoft recorded a trading volume of 25.29 million shares and gained 3.69 percent. The software company benefited from an award to its subsidiary Hitachi Solutions, which received the Microsoft AI Business Solutions Inner Circle Award for 2026-2027 on September 24, 2026.
Nike achieved similarly high volume with 26.34 million shares traded but lost 0.22 percent. The sportswear manufacturer remained under selling pressure.
Semiconductor Sector Drives Market Activity
The semiconductor sector proved to be a central driver of trading activity on September 25 and 26, 2026. Micron Technology rose 1.4 percent on September 26 to 1,082.80 US dollars, driven by increased demand for high-performance memory chips for AI applications. Advanced Micro Devices gained 0.8 percent on the same day to 629.85 US dollars.
The sustained strength in the semiconductor sector reflects continued investor interest in AI-related applications and computing infrastructure.
Market Environment and Weekly Developments
The S&P 500 ended the trading week of September 25, 2026 with a weekly gain of 0.6 percent. The Nasdaq 100 performed significantly better with an increase of 2.1 percent, while the Dow Jones Industrial Average lost 103 points.
On September 26, 2026, major US indices showed marginal gains: The Invesco QQQ Trust (Nasdaq tracker) rose 0.04 percent, the SPDR Dow Jones Industrial Average ETF also gained 0.04 percent, while the iShares Russell 2000 ETF (Small Caps) showed the best performance with a gain of 0.06 percent. The SPDR S&P 500 ETF Trust remained virtually unchanged with a gain of 0.01 percent.
Market sentiment remained cautiously optimistic, supported by cooling inflation data, which reinforced expectations of a stable interest rate environment for the final quarter of 2026. The VXX volatility index rose 0.12 percent on September 26, indicating hedging activities by traders against potential news cycles over the weekend.
Individual Weekly Developments
Meta recorded a decline of 3.3 percent in the trading week of September 25, 2026, after the stock had gained roughly 12 percent over the entire week. The increase followed a series of hardware releases related to the AI agent Muse. Oracle lost 1.7 percent during the week.
In the bond market, the iShares 7-10 Year Treasury Bond ETF rose 0.02 percent on September 26, while the iShares 20+ Year Treasury Bond ETF declined by 0.01 percent.