Market Summary
U.S. equities closed lower on the final trading day of August, with the Dow Jones Industrial Average dropping 374.09 points (-0.70%) to 53,185.90, the S&P 500 falling 25.62 points (-0.33%) to 7,686.14, and the Nasdaq Composite off a more modest 31.53 points (-0.12%) to 26,391.94. All three indices finished well off their session lows as late buying in technology and semiconductor names helped the S&P 500 and Nasdaq claw back a portion of earlier losses, while the Dow underperformed throughout the session.
The dominant theme was a fresh escalation in U.S.-Iran hostilities over the weekend, which sent crude oil sharply higher and weighed broadly on risk sentiment. WTI crude settled up $2.45 (+2.9%) at $85.83/bbl, recovering much of last week’s decline after Axios reported President Trump is weighing limited strikes to curb Iran’s ability to threaten shipping in the Strait of Hormuz. The energy sector was the standout beneficiary, gaining 2.1%, while nearly every other sector finished in the red. Small- and mid-caps lagged the broader tape, with the Russell 2000 and S&P Mid Cap 400 each down roughly 0.5%.
Beneath the index-level moves, dispersion was notable. Information technology (+0.3%) turned positive late in the day as semiconductors caught a bid — the PHLX Semiconductor Index rose 0.6% and closed out August with a 2.0% monthly gain despite significant intra-month volatility. Mega-cap performance was mixed: NVIDIA (+1.36%) and Tesla (+5.52%) rallied, while Alphabet (-2.18%) and Amazon (-2.50%) dragged on communication services and consumer discretionary, respectively. Despite today’s pullback, all three major averages closed out August with solid monthly gains, and WaveFinder breadth data flagged “Very Bullish” primary sentiment even as shorter-term (4%) and 40-SMA sentiment readings registered bearish.
Market Snapshot
| Index | Level | Change | % Change |
|—|—|—|—|
| Dow Jones | 53,185.90 | -374.09 | -0.70% |
| S&P 500 | 7,686.14 | -25.62 | -0.33% |
| Nasdaq Composite | 26,391.94 | -31.53 | -0.12% |
Breadth (NYSE/Nasdaq composite tape):
- NYSE: 960 advancers / 1,773 decliners; volume 1.73 bln
- Nasdaq: 1,936 advancers / 3,001 decliners; volume 7.74 bln
WaveFinder Breadth Metrics:
- Primary Sentiment: Very Bullish | 4% Sentiment: Bearish | 40 SMA Sentiment: Bearish
- Primary Bulls/Bears: 1,064 / 815
- 4% Bulls/Bears: 77 / 105
- Stocks Above 20-day SMA: 13%
- Stocks Above 40-day SMA: 42.08%
- 9-Month Bulls/Bears: 7 / 8 (Follow-Through: 18.18%)
YTD Performance:
- Russell 2000: +19.1%
- S&P Mid Cap 400: +13.8%
- Nasdaq Composite: +13.5%
- S&P 500: +12.3%
- DJIA: +10.7%
Sector Performance
Ranked from strongest to weakest (per Briefing.com Industry Watch):
1. Energy +2.1% — beneficiary of surging crude on U.S.-Iran tensions
2. Information Technology +0.3% — late-session semiconductor strength
3. Consumer Discretionary -0.7% — pressured by Amazon on FTC lawsuit report
4. Utilities -1.2% — Edison and PG&E hit hard by wildfire-legislation developments
5. Industrials -1.2% — weakness across military contractors; Howmet Aerospace a major laggard
6. Communication Services -1.6% — weakest sector; Alphabet a primary drag
7. Real Estate — weak (no specific % disclosed)
8. Materials — weak (no specific % disclosed)
9. Health Care — weak (no specific % disclosed)
10. Consumer Staples — weak (no specific % disclosed)
11. Financials — weak (no specific % disclosed)
Volatility Context (WaveFinder Sector ATR): Energy showed the highest volatility reading (ATR 2.92%, falling, P74), followed by Health Care (2.31%, flat, P32) and Communication Services (2.26%, rising, P63). Utilities (-2.49%, falling, P0) and Real Estate (-1.63%, falling, P0) registered the most subdued/falling volatility profiles.
Key Earnings & Movers
- Tesla (TSLA) 368.01, +19.26 (+5.52%) — Rallied above its 50-day moving average (359.81) on enthusiasm around autonomous driving and energy storage; Elon Musk’s goal of 100 GW annual solar production added to bullish sentiment.
- CrowdStrike (CRWD) 231.00, +12.60 (+5.77%) — Top-performing S&P 500 component, extending its post-earnings advance.
- NVIDIA (NVDA) 220.50, +2.95 (+1.36%) — Semiconductor standout following last week’s earnings-driven surge.
- Aon (AON) 321.34, -34.06 (-9.58%) — Fell sharply after announcing a $17.0 billion cash acquisition of USI Insurance Services.
- Alphabet (GOOG) 335.41, -7.47 (-2.18%) — Lagged within communication services.
- Amazon (AMZN) 259.77, -6.66 (-2.50%) — Pressured by WSJ report that the FTC plans to file a lawsuit against the company.
- Edison International (EIX) 53.96, -16.21 (-23.10%) — Plunged on California wildfire legislation developments.
- PG&E (PCG) 13.28, -3.32 (-20.00%) — Also hit hard by wildfire legislation news.
- Howmet Aerospace (HWM) 244.91, -19.94 (-7.53%) — Dropped after Musk suggested SpaceX in-house turbine-blade casting could accelerate deployment timelines by up to 18 months.
- SpaceX (SPCX) 143.75, +2.25 (+1.59%).
- Science Applications International (SAIC) — Rallied following a Q2 beat and raised FY27 guidance (adj. EPS to $10.65-$10.75; revenue to $7.2-$7.3 bln).
Stock Spotlight
Aon (AON) was the session’s most notable corporate story, sliding 9.58% to $321.34 after agreeing to acquire USI Insurance Services from KKR for $17.0 billion in cash — a deal that expands Aon’s presence in the more than $40 billion U.S. middle-market segment and builds on its 2024 acquisition of NFP. While the strategic rationale is sound — extending Aon’s Risk Capital and Human Capital capabilities and boosting access to the fast-growing E&S market (26% of U.S. commercial P&C premiums) — investors focused squarely on deal economics. The $16.7 billion net purchase price equates to roughly 14.5x trailing adjusted EBITDA on a synergized basis, with Aon expecting approximately $395 million in annual run-rate net adjusted EBITDA synergies to be substantially realized by 2029.
The market’s negative reaction centers on financing and timing: Aon will fund the deal entirely with new debt, prioritizing deleveraging over near-term share buybacks, and does not expect the transaction to be accretive to adjusted EPS until 2028. This comes despite a healthy underlying business — Q2 organic revenue growth of 5% and adjusted operating margin expansion of 70 bps year-over-year to 28.9%. Briefing.com’s analysis suggests today’s selloff reflects concerns over deal size, leverage, and delayed accretion rather than doubts about the strategic logic of adding USI.
Bond Market & Treasuries
Treasuries ended August broadly weaker, with fresh 2026 highs in yields across the 3-year, 5-year, 7-year, and 10-year tenors. The sell-off began overnight on rising oil prices and persisted through the session.
Yield Levels (Aug 31 close):
- 2-year: 4.35% (unchanged on the day; +6 bps in August)
- 3-year: 4.41% (+1 bp; +5 bps in August)
- 5-year: 4.51% (+3 bps; +5 bps in August)
- 10-year: 4.76% (+4 bps; +1 bp in August) — approaching its 2025 peak of 4.809%
- 30-year: 5.25% (+4 bps; -3 bps in August)
The 2-year note outperformed throughout the session, holding just below its July high of 4.370%, while longer tenors bore the brunt of the selling. No U.S. economic data was released today. Treasury Secretary Bessent and Fed Chairman Warsh participated in G20 finance minister talks but offered no market-moving remarks. The U.S. Dollar Index fell 0.3% to 99.41 (-0.4% for August).
Commodities
- WTI Crude Oil: $85.83/bbl, +$2.45 (+2.9%) — driven by U.S.-Iran hostilities; up just over $1/bbl for August
- Gold: $4,479.80/ozt, -1.1%
- Copper: $6.69/lb, +0.5%
Overseas Markets
Specific overseas equity index levels were not disclosed in today’s data; however, key international economic releases influenced overnight sentiment:
- China: August Manufacturing PMI 49.8 (vs. 49.5 expected, 49.2 prior); Non-Manufacturing PMI 49.0 (vs. 49.5 expected, 49.0 prior)
- Japan: July Retail Sales +4.0% yr/yr (vs. 3.2% expected, 0.6% prior); Housing Starts +8.2% yr/yr; Construction Orders -13.4% yr/yr. PM Takaichi’s cabinet approval held steady at 53% (Asahi poll).
- South Korea: July Retail Sales -2.4% m/m; Service Sector Output -1.3% m/m; Industrial Production +0.2% m/m (+3.6% yr/yr)
- Hong Kong: July Retail Sales +4.5% yr/yr
- Australia: Q2 Company Gross Operating Profits +1.8% qtr/qtr; Pre-tax Profits +12.5% qtr/qtr; July Private Sector Credit +0.6% m/m; August MI Inflation Gauge +0.5% m/m
- New Zealand: August ANZ Business Confidence 53.7 (down from 56.1)
- India: Q1 GDP +7.8% yr/yr (in line with prior)
- Germany: August CPI +0.2% m/m (vs. 0.3% expected), +2.9% yr/yr (vs. 3.0% expected)
- Spain: June Current Account surplus of EUR2.41 bln (vs. EUR1.84 bln prior)
Currencies: EUR/USD +0.3% to 1.1616; GBP/USD +0.1% to 1.3548; USD/JPY -0.2% to 159.78; USD/CNH -0.1% to 6.7186
Economic Data
No U.S. economic data of note was released during today’s session.
Looking Ahead
- 9:45 ET (Tue): Final August S&P Global U.S. Manufacturing PMI (prior 53.2)
- 10:00 ET (Tue): July Job Openings (Briefing.com consensus 7.390 mln; prior 7.359 mln)
- 10:00 ET (Tue): July Construction Spending (Briefing.com consensus 0.2%; prior -0.1%)
- 10:00 ET (Tue): August ISM Manufacturing Index (Briefing.com consensus 55.3%; prior 55.6%)
- G20 Finance Ministers Meeting: Continues Tuesday with Treasury Secretary Bessent and Fed Chairman Warsh in attendance
- Wednesday: Reserve Bank of New Zealand policy statement — market watching for potential rate hike signal
- Broader market entering the holiday-shortened week ahead of Labor Day weekend, which may bring thinner trading conditions and potential for increased volatility