U.S. Stock Market Recap August 1: U.S.-Iran Stalemate Pressures Market Again, Second Consecutive Day of Declines

On Tuesday, August 11, U.S. stocks opened higher but turned lower, with the three major indexes closing down for a second straight session: the Dow fell 0.34%, the S&P 500 dropped 0.32%, and the Nasdaq declined 0.60%. The back-and-forth on the U.S.–Iran standoff kept pushing oil prices higher (WTI +1.3%), while Google’s 3.84% plunge after restructuring its AI division dragged Communication Services to the bottom. Semiconductors bucked the trend (Philadelphia Semiconductor Index +0.87%), but China ADRs tumbled (the Golden Dragon Index -2.94%). Markets stayed cautious ahead of Wednesday’s CPI release.

1. The Three Major Indexes

· Dow Jones 53,791.85, -0.34% (-184.13) · S&P 500 7,728.20, -0.32% (-24.91) · Nasdaq 26,445.45, -0.60% (-159.91)

The pullbacks were all smaller than 0.65%, and the S&P 500 remains close to its August 7 all-time closing high. Small caps bucked the trend with a 0.32% gain, suggesting sector rotation rather than a systematic exodus. The Wind U.S. Tech Seven Giants Index fell 1.13% on the day and was the main drag.

2. Sectors: Eight Down, Three Up

Of the 11 S&P 500 sectors, eight fell and three rose. Energy and Utilities provided a floor, while Communication Services and Real Estate led the decline.

· Utilities +1.11%: defensive appeal + a small pullback in rates · Energy +1.06%: oil up for a second straight day (WTI +1.3%) · Communication Services -2.12%: Google -3.84% led the drop, under pressure after the AI division reorganisation · Real Estate -0.86%: rate-sensitive, weighed by soft housing data

Communication Services was the worst performer at -2.12%, almost entirely driven by Google alone. The picture was a complete reversal from August 10, when Energy surged 4.63%. The sector narrative shifted from “geopolitics + oil” to “single-stock event (Google) + defense.”

3. Notable Movers

【Tech Giants】by market cap

· Nvidia NVDA 217.50, -0.02%: essentially flat · Apple AAPL 304.91, -1.09%: iPhone outlook concerns · Microsoft MSFT 503.81, -0.44%: modest weakness · Amazon AMZN 272.27, -2.09%: largest drag among the giants · Broadcom AVGO 416.08, -1.50%: drifted lower with the market · Google GOOGL 343.80, -3.84%: down four of the last five sessions, AI reorganisation weighing · Meta 599.12, +0.71%: bucked the trend, closing higher · Tesla TSLA 332.81, +0.58%: bucked the trend, closing higher

【Semiconductors】Philadelphia Semiconductor Index +0.87% (24 of 30 names up, 6 down). In stark contrast to the 2.94% plunge on August 10, semiconductors, memory and optical communications staged a broad rebound, catalysed by Lumentum’s blowout earnings guidance.

· AMD +1.01% 　· TSMC TSM +0.86% 　· Intel INTC +0.19% 　· Entegris / KLA / Teradyne / ASML +3.8%~+4.2%

【AI Memory】memory steady, hard drives strong

· Micron MU 868.52, +0.87% (HBM/DRAM at cyclical highs) · Seagate STX 820.52, +2.44% (HDD nearline storage led the gains) · Western Digital WDC 437.93, -0.09% (consolidating at elevated levels)

Divergence within memory: Seagate HDD led, Micron edged higher, Western Digital consolidated; South Korea’s SK Hynix also rose roughly 4.7%.

【Optical Communications】800G/1.6T demand confirmed, the networking layer was strongest

· Arista ANET 197.85, +3.31% (switching/networking, strongest in the optical chain) · Coherent COHR 328.57, +1.05% (optical modules/components) · Lumentum LITE 820.59, +0.87% (earnings guidance far exceeded expectations) · Ciena CIEN 387.53, -0.04% (essentially flat)

The networking layer (Arista +3.31%) outperformed the component layer. Lumentum confirmed strong demand for 800G/1.6T, prompting the market to revise AI optical-chain earnings estimates higher.

【China ADRs】Golden Dragon Index -2.94%

· Alibaba BABA -3.38% 　· JD.com JD -4.63% 　· Bilibili BILI -5.27% 　· New Oriental EDU -4.31% 　· Tencent Music -11.92% (biggest decliner) · Zai Lab +10.31% / Legend Biotech +5.66% (a handful of names bucking the trend)

Compare: on August 10 the Golden Dragon was still +1.65%; just one day later it swung to -2.94%. China ADRs failed to sustain their independent momentum.

4. Key Events and Market Logic

1. U.S.–Iran stalemate flared, Strait of Hormuz re-opening nowhere in sight. Iran said the strait will not open until conditions are met; Saudi vessels were attacked near the Bab el-Mandeb Strait (at least 3 dead); U.S. forces opened fire on a Panamanian-flagged cargo ship. Oil rose for a second consecutive day, remaining the day’s core macro variable.
2. Google -3.84%, Communication Services led the decline. After restructuring its AI division, Google has fallen in four of the last five trading days, dragging Communication Services down 2.12% to the bottom.
3. The AI infrastructure financing chain continued to strengthen. Nvidia’s $500 billion computing-power financing platform continued to gather momentum – KKR +6.88%, Apollo +6.26%, Blackstone +3.89%, BlackRock +1.54%; NEBIUS +4.95% rose in sympathy.
4. Ahead of inflation data, Treasury yields edged lower. The 10Y yield slipped about 2bp to 4.69%. Eyes on Wednesday’s CPI and Thursday’s PPI – the “New Fed wire” said the two reports could decide the fate of a September rate hike.

5. Major Asset Classes

· WTI Crude (Sep) 83.20, +1.30% · Brent (Oct) 88.91, +1.36% · COMEX Gold 4,427.8, +0.18% · U.S. Dollar Index DXY 99.83, ≈ flat +0.01% · 10Y U.S. Treasury 4.69%, approx -2bp · Spot Gold 4,368, -0.50%

Asset-class profile: oil rose driven by a single geopolitical variable; gold, the dollar and Treasuries were calm – a localized “geopolitics + oil” shock, not a broad-based risk-off move.

6. Review and Takeaways

1. A second straight down day, still a “high-level consolidation” rather than a trend reversal. The declines were all under 0.65%, with the S&P 500 just a stone’s throw from its August 7 all-time high; small caps closed higher, signaling rotation rather than an outright exodus.
2. Oil is the most critical variable for the week ahead. The U.S.–Iran standoff → oil → inflation / rate-hike expectations remains the main thread. With WTI above 83, if CPI surprises to the upside and pushes the 10Y through 4.7%, tech will be under pressure; conversely, any progress on negotiations would lead to a relief rally.
3. Structural dispersion is extreme – the AI narrative is shifting from “buy chips” to “buy capital.” Communication Services led the decline, semiconductors rebounded, China ADRs plunged, and the AI financing chain strengthened. KKR, Apollo and Blackstone surged against the tape, showing the AI tailwind is spreading from hardware to capital and infrastructure.
4. Risk points: this week’s CPI/PPI is the catalyst, and Google’s breakdown needs monitoring. The two inflation reports will dictate September rate-hike expectations; whether Google’s technical breakdown continues will determine if Communication Services can stabilize.

This report is for personal research reference only and does not constitute investment advice.