Market Summary
U.S. equities opened the week on a defensive note, with all three major averages closing lower as a violent rotation out of semiconductor and AI-infrastructure names overshadowed strength in software, communication services, and defensive sectors. The S&P 500 fell 37.00 points (-0.48%) to 7619.98, the Nasdaq Composite dropped 146.62 points (-0.56%) to 26207.46, and the DJIA declined 152.09 points (-0.29%) to 52421.20. The S&P 500 Equal-Weighted Index finished unchanged, underscoring how narrowly concentrated today’s losses were.
Selling was most intense during the morning session, when the S&P 500 briefly dipped below 7,600 as WTI crude topped $104/bbl and the 10-year Treasury yield pushed past 5.00% for the first time since late 2023. Both pressures eased as the day progressed — oil retreated from its highs after President Trump signaled openness to a quick deal with Iran, and yields backed off their peak — allowing the major indices to claw back a substantial portion of their early losses.
The defining story of the session was a sharp divergence within the AI trade. Renewed debate over AI safety — sparked by comments from Anthropic’s Dario Amodei, OpenAI’s Sam Altman, and Elon Musk calling for the industry to “pace the frontier” — triggered a severe selloff in semiconductors, memory, and data-center infrastructure names, while simultaneously fueling a rally in cybersecurity and software stocks on heightened security concerns. The PHLX Semiconductor Index plunged 5.9%, dragging Information Technology (-1.7%) and Industrials (-1.4%) lower, while Communication Services (+2.8%), Health Care (+1.4%), and Consumer Staples (+1.3%) posted solid gains. Breadth remained soft throughout, with WaveFinder’s “Very Bearish” sentiment reading reinforcing the selective, rotational nature of the buying interest. Attention now turns to Wednesday’s FOMC decision as the week’s primary catalyst.
Market Snapshot
| Index | Level | Change | % Change |
|—|—|—|—|
| DJIA | 52,421.20 | -152.09 | -0.29% |
| Nasdaq Composite | 26,207.46 | -146.62 | -0.56% |
| S&P 500 | 7,619.98 | -37.00 | -0.48% |
Breadth (NYSE): Advancers 1,098 | Decliners 1,638 | Volume 1.19 bln
Breadth (Nasdaq): Advancers 2,109 | Decliners 2,771 | Volume 7.24 bln
WaveFinder Market Breadth:
- Primary Sentiment: Very Bearish (Bulls 833 / Bears 909)
- 4% Sentiment: Bearish (Bulls 232 / Bears 290)
- 40-SMA Sentiment: Bearish
- Stocks Above 20-day SMA: 15%
- Stocks Above 40-day SMA: 30.85%
- 9-Month Bulls: 26 | Bears: 33 (Follow-Through: 23.81%)
YTD Performance: Russell 2000 +16.5% | Nasdaq Composite +12.7% | S&P Mid Cap 400 +11.3% | S&P 500 +11.3% | DJIA +9.1%
Sector Performance
Leaders:
1. Communication Services: +2.8% (GOOG, META strength)
2. Health Care: +1.4%
3. Consumer Staples: +1.3% (KR extending post-earnings gains)
Laggards:
4. Utilities: -1.3%
5. Industrials: -1.4% (spillover from AI-infrastructure weakness)
6. Information Technology: -1.7% (PHLX Semiconductor Index -5.9%)
7. Materials: Weak (magnitude not detailed)
8. Real Estate: Weak (magnitude not detailed)
9. Consumer Discretionary: Weak (magnitude not detailed)
10. Financials: Weak (magnitude not detailed)
11. Energy: Not specifically flagged among today’s strong/weak groups
WaveFinder Sector ATR (Volatility):
- Energy: 1.57% (falling, P0)
- Communication Services: 1.54% (falling, P37)
- Health Care: 1.44% (falling, P21)
- Technology: -0.74% (rising, P63)
- Consumer Staples: -0.79% (falling, P16)
- Financials: -0.41% (falling, P0)
- Materials: -1.38% (falling, P0)
- Consumer Discretionary: -1.26% (falling, P11)
- Real Estate: -2.30% (falling, P16)
- Industrials: -2.05% (flat, P0)
- Utilities: -2.81% (flat, P0)
Key Earnings & Movers
Decliners:
- Corning (GLW) — $143.50, -22.90 (-13.76%): Worst S&P 500 performer; pressured by AI-infrastructure selloff plus a prospectus supplement tied to an equity distribution agreement covering up to $2 billion of common stock.
- Teradyne (TER) — $329.20, -50.52 (-13.30%): Swept up in semiconductor/AI-infrastructure selloff.
- Coherent (COHR) — $266.50, -38.87 (-12.73%): Among worst S&P 500 performers on AI-infrastructure weakness.
- Broader chip complex (intraday, ~11:29 ET): MRVL -8%, LRCX -8.5%, KLAC -8%, HPE -9%, VRT -9%, GEV -7%, BE -7%, ETN -7%, INTC -7%, MU -7%, SNDK -7%, AMAT -7%, LITE -8%, COHR -7%, QCOM -6%, AMD -6%, ASML -6%, SMCI -6%, ANET -6%, DELL -5%, ORCL -5%, AVGO -4%, NVDA -3%.
Advancers:
- CrowdStrike (CRWD) — $235.38, +28.64 (+13.85%): Top S&P 500 performer as cybersecurity demand rose on AI-safety concerns.
- Palo Alto Networks (PANW) — $373.94, +43.29 (+13.09%): Strong gain alongside cybersecurity peers.
- Gartner (IT) — $197.07, +17.48 (+9.73%): Among top S&P 500 performers.
- Alphabet (GOOG) — $345.71, +10.26 (+3.06%): Led communication services higher.
- Meta Platforms (META) — $665.60, +17.57 (+2.71%): Helped offset broader tech weakness.
- Kroger (KR) — $60.91, +2.42 (+4.14%): Extended post-earnings momentum from last week.
- Definium Therapeutics (DFTX) — Sharply higher after positive Phase 3 Panorama results for DT120 ODT in generalized anxiety disorder (second positive Phase 3 GAD readout, third overall pivotal success); company targets a pre-NDA meeting in Q4 2026 and NDA filing in 1H27.
Stock Spotlight
The dominant story of the session was the market’s violent reassessment of the AI investment narrative following a weekend surge in “AI safety” commentary. Anthropic CEO Dario Amodei published an essay calling on the industry to “pace the frontier,” urging greater use of independent evaluators and coordination among developers to ensure safety efforts keep up with rapidly advancing capabilities. OpenAI’s Sam Altman and Elon Musk backed the call for caution, and Altman separately indicated an OpenAI IPO in 2026 would be ill-advised. Microsoft also released a draft AI code of conduct requiring future models to remain subject to human correction and shutdown. The debate was amplified by the public resignation of AI researcher Jacob Coxon, formerly of OpenAI and Anthropic, who cited serious concerns about AI risk oversight.
The market reaction bifurcated sharply along AI-exposure lines. GPU, memory, semi-cap equipment, and data-center infrastructure names were hit hardest — Corning (-13.76%), Teradyne (-13.30%), and Coherent (-12.73%) led S&P 500 decliners, while the PHLX Semiconductor Index sank 5.9%. Conversely, cybersecurity stocks surged on the view that increasingly autonomous AI systems raise the stakes for security infrastructure, with CrowdStrike (+13.85%) and Palo Alto Networks (+13.09%) topping the S&P 500’s gainers list — a trade further reinforced by news of a Hugging Face cyberattack. The episode illustrates how quickly sentiment can rotate within the AI complex even as the broader indices posted only modest net losses.
Bond Market & Treasuries
U.S. Treasuries opened the week under pressure but staged a mid-morning recovery to finish with modest gains across most tenors. The 10-year note yield touched a fresh 2026 high of 5.01% intraday — two basis points above its late-2023 peak — before retreating to settle at 4.96% (-1 bp). The 2-year yield settled at 4.63% (-1 bp), the 3-year was unchanged at 4.73%, the 5-year was unchanged at 4.79%, and the 30-year fell 3 bps to 5.33%.
The early selloff was driven by crude oil’s surge toward $105/bbl, but Treasuries rallied after President Trump pushed back against AI-guardrail calls, indicated Russia and Ukraine had agreed not to strike each other’s energy infrastructure, and teased a potential new approach with Iran — all of which helped crude give back much of its gain. The U.S. Dollar Index rose 0.3% to 99.40, moving back above its 200-day moving average (99.14). A $13 billion 20-year Treasury bond reopening was auctioned at 13:00 ET. Markets are increasingly positioned for a 25-bp rate hike at Wednesday’s FOMC decision.
Commodities
- WTI Crude Oil: $101.23/bbl, +$1.15 (+1.2%) — retreated from an intraday high near $104-105 after Saudi Arabia’s East-West pipeline shutdown and postponed Iran-Gulf talks initially drove prices higher; gains pared as President Trump signaled openness to a quick Iran deal.
- Gold: $4,352.30/ozt, -1.3%
- Copper: $6.41/lb, -2.1%
- Silver: Not available in source data
Overseas Markets
Specific index levels for Asian and European bourses were not included in today’s source data. Key overnight/regional economic developments included:
- China: August New Loans came in at CNY60.0 bln, well below the CNY480.0 bln expected (prior: -CNY340.0 bln); Outstanding Loan growth was 5.0% yr/yr (expected 5.1%; prior 5.1%); Total Social Financing was CNY1.660 trln (expected CNY2.04 trln; prior CNY660.0 bln) — a notably soft credit impulse.
- Japan: July Industrial Production fell 0.2% m/m (expected +0.1%; prior +1.9%); Capacity Utilization rose 0.5% m/m (prior +4.1%). Japan’s chief cabinet secretary said JGB issuance will be managed through initial and extra budgets.
- Hong Kong: Q2 PPI +13.1% yr/yr (prior +17.7%); Q2 Industrial Production +2.3% yr/yr (prior +3.2%).
- India: August WPI Inflation +9.92% yr/yr (expected 9.89%; prior 9.78%); August CPI +4.98% (expected 4.80%; prior 4.44%) — inflation running hotter than expected.
- New Zealand: August Performance of Services Index 51.2 (prior 50.6); July Visitor Arrivals +0.5% m/m.
- Switzerland: August PPI +0.7% m/m (expected +0.1%; prior -0.1%), but -0.7% yr/yr (prior -2.1%).
- ECB: Policymakers Kazaks, Kazimir, and Simkus left the door open to additional rate hikes.
Economic Data
No U.S. economic data of note was released today. International releases (China credit data, Japan industrial production, India inflation, etc.) are detailed in the Overseas Markets section above.
Looking Ahead
- September 15: Empire State Manufacturing Index (8:30 ET; Briefing.com consensus 14.1; prior 20.6)
- September 15-16: FOMC meeting — market pricing an elevated probability (88.5% per Page One / CME FedWatch) of a 25-bp hike to a 3.75-4.00% target range; decision due Wednesday afternoon
- This week: Bank of England and Bank of Japan policy decisions also on tap, with the BOJ outcome carrying potential yen carry-trade implications
- Continued focus on crude oil price action and Iran-related geopolitical headlines as a swing factor for both equities and Treasury yields
- Ongoing monitoring of the AI-safety debate and its impact on semiconductor, data-center infrastructure, and cybersecurity stock performance