Stock Market Breaks Lower As Oil Prices Rebound Amid Iran War; Arm Flexes: Weekly Review

• Oil prices whipsawed from above $100 to $88 then back to $97+ per barrel as Iran rejected Trump's peace plan and demanded permanent control of the Strait of Hormuz, with futures showing prices remaining elevated through November
• Memory chip stocks tumbled on cyclical peak concerns and Google's report of improved compression algorithms potentially reducing memory usage, weighing on Micron and equipment makers
• Meta and Google faced significant declines after jury rulings found their platforms contributed to mental health issues and exposed minors to harmful content, marking a potential 'Big Tobacco moment' that could undermine Section 230 protections

Market Summary: Stock Market Declines on Iran Tensions and Oil Price Surge

Key Market Movements

The stock market ended the week significantly lower after opening strong, with the Nasdaq and S&P 500 falling to six-month lows. The Dow Jones finished flat for the week, while small caps pulled back from resistance levels. Memory chip stocks and several megacaps experienced sharp declines.

Iran Conflict and Oil Prices

Crude oil prices exhibited extreme volatility, initially surging above $100/barrel before dropping to $88 following Trump's diplomatic announcement and five-day deadline extension. However, after Iran rejected the peace plan and demanded permanent control of the Strait of Hormuz, prices rebounded above $97 (U.S.) and $110 (Brent) by Friday morning. Markets expect prices to remain above $80 through November, indicating prolonged conflict impact. Treasury yields reached eight-month highs.

Company-Specific Developments

Arm Holdings surged after unveiling its first merchant silicon server chip for AI data centers, projecting sales growth from $1 billion (fiscal 2028) to $15 billion (fiscal 2031).

Meta Platforms plummeted 10% to 10-month lows after court rulings found the company liable for mental health issues caused by addictive features. A similar ruling against YouTube sent Alphabet down 8%.

Memory chip stocks tumbled on concerns about cyclical peaks and Google's improved compression algorithms potentially reducing memory demand.

SpaceX IPO reports indicated the company could file soon, targeting $75+ billion in one of history's largest offerings, potentially seeking a $1.75 trillion valuation.

Cybersecurity firms including CrowdStrike and Palo Alto Networks showcased AI tools at the RSA conference, though Anthropic's competing announcements pressured sector stocks.

Sector Impact

Software stocks fell on Amazon reports of AI agent development for sales automation, raising AI disruption concerns across the sector.