In the U.S. regular session on August 12, 2026, the Russell 2000 and Nasdaq Composite rose, while the Dow Jones edged lower. Among the stocks tracked, SanDisk, Micron, and Nvidia significantly outperformed the indexes, while Meta, Microsoft, Amazon, and others declined, revealing performance gaps among individual stocks that were not apparent from the index gains alone.
The Russell and Nasdaq Led the Gains
All figures below are closing data from the U.S. regular session on August 12, 2026. Index levels and day-over-day changes are measured in points, while percentage changes are measured in %.
| Major Index | Close (Points) | Change |
|---|---|---|
| S&P 500 | 7,748.50 | +20.30 points (+0.26%) |
| Nasdaq Composite | 26,588.49 | +143.04 points (+0.54%) |
| Dow Jones | 53,770.27 | -21.58 points (-0.04%) |
| Russell 2000 | 3,045.48 | +18.36 points (+0.61%) |
On August 12, 2026, the Russell 2000 closed at 3,045.48 points, up 18.36 points, or 0.61%, from the previous session, posting the largest percentage gain among the major indexes. The Nasdaq Composite followed, rising 143.04 points, or 0.54%, to 26,588.49 points in the same session.
The S&P 500 closed at 7,748.50 points on August 12, 2026, up 20.30 points, or 0.26%. By contrast, the Dow Jones ended the same session at 53,770.27 points, down 21.58 points, or 0.04%, making it the only major index to decline. Trading Economics also reported gains in U.S. stock indexes that day. That report concerned separate index data; the exact closing levels and percentage changes in this briefing are based on the individual index data shown in the table above. Original Trading Economics market report
The closing data directly show that not only the tech-heavy Nasdaq but also the small- and mid-cap-focused Russell rose, while the Dow finished slightly lower. In the editor’s interpretation, it would be difficult to characterize the market on August 12, 2026, as a one-sided rally driven solely by large technology stocks. However, the indexes’ concurrent movements alone cannot establish the direction of capital flows or identify who was buying.
SanDisk, Micron, and Nvidia Formed the Core of the Rally
SanDisk closed at $1,344.29 in the regular session on August 12, 2026, up $73.24, or 5.76%, from the previous session. It recorded the largest absolute percentage move among the stocks tracked, with trading volume of 11,762,326 shares in the same session. Previous coverage of the individual stock is available through SanDisk closing data and the SanDisk stock hub.
Micron closed at $911.29 on August 12, 2026, up $42.77, or 4.92%, with trading volume of 35,803,171 shares. Nvidia also gained $6.59, or 3.03%, in the same session, closing at $224.09 on volume of 105,683,089 shares. Micron closing data Micron stock hub Nvidia closing data Nvidia stock hub
All three stocks outpaced the Nasdaq Composite’s 0.54% gain on August 12, 2026. In the editor’s interpretation, the strength of SanDisk and Micron provided the clearest indication of the upward direction among the tracked stocks, with Nvidia also participating. However, the provided closing data do not include the reasons for the individual companies’ gains, so it cannot be concluded that a single common catalyst drove all three stocks higher.
Meta and Microsoft Diverged From the Rising Market
Meta closed at $578.85 on August 12, 2026, down $20.27, or 3.38%, from the previous session, posting the largest decline among the stocks tracked. Trading volume in the same session was 15,847,495 shares. Previous coverage is available through Meta closing data and the Meta stock hub.
Microsoft closed at $492.43 on August 12, 2026, down $11.38, or 2.26%. Amazon declined $4.99, or 1.83%, to $267.28 in the same session, while Tesla fell $5.30, or 1.59%, to $327.51. Microsoft closing data Microsoft stock hub Amazon closing data Amazon stock hub Tesla stock hub
Apple closed at $302.25 on August 12, 2026, down $2.66, or 0.87%, while Alphabet showed a relatively limited move in the same session, declining $0.26, or 0.08%, to $343.54. Apple closing data Apple stock hub Alphabet closing data Alphabet stock hub
Based solely on the closing data, many of the large technology stocks tracked declined on August 12, 2026, even as the Nasdaq Composite gained 0.54%. In the editor’s interpretation, the performance gaps among individual stocks stood out more than the size of the index gain during the session. However, the provided information does not establish the reasons for each stock’s decline.
Rates Moved Only Slightly as Markets Focused on CPI
The U.S. 10-year Treasury yield closed at 4.682% on August 12, 2026, down 0.002 percentage points from the previous session. The VIX closed at 14.47 points in the same session, down 0.81 points, or 5.30%, from the previous session. U.S. 10-year Treasury yield data VIX closing data
A WSJ report said the market was paying particular attention to the consumer price index on August 12, 2026, noting as context that Federal Reserve officials were watching it more closely. Original WSJ market report A Schwab report cited a moderate consumer price index reading and artificial intelligence-related earnings as reasons for the early gains in stocks. This was the explanation presented in the article, and the early-session move should be distinguished from the regular-session close. Original Schwab market report
The closing data show that on August 12, 2026, the U.S. 10-year Treasury yield slipped by only 0.002 percentage points, while the VIX fell 5.30% and the S&P 500 rose 0.26%. In the editor’s interpretation, the decline in the volatility index coincided with gains in the stock index, but those concurrent movements alone do not establish that the inflation data directly caused either the rise in stocks or the decline in the VIX.
Three Items to Watch in the Next Regular Session
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It will be important to see whether the Russell 2000 and Nasdaq Composite, which rose 0.61% and 0.54%, respectively, on August 12, 2026, remain relatively stronger at the next regular-session close than the Dow Jones, which fell 0.04%.
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It will be worth watching whether the performance gap narrows in the next regular session between SanDisk, Micron, and Nvidia, which rose 5.76%, 4.92%, and 3.03%, respectively, on August 12, 2026, and Meta and Microsoft, which declined 3.38% and 2.26%.
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The next point to check is how the U.S. 10-year Treasury yield, which closed at 4.682% on August 12, 2026, and the VIX, which closed at 14.47 points, combine at the next regular-session close with the S&P 500 and Nasdaq Composite. This is an item for observation and does not indicate a conclusion about the next session’s direction or a recommendation to trade.