Daily Summary: Chip War Weighs on Wall Street as Oil Plunges After US–Iran Ceasefire

Date: 27 July 2026

Market Overview

Wall Street is experiencing a downturn, with key US indices trading in the red following initial optimism from a ceasefire between the US and Iran. The S&P 500 is down approximately 0.3%, the Nasdaq 100 has fallen nearly 0.7%, while the Dow Jones remains slightly positive.

Sector Performance

The semiconductor sector is under significant pressure, with notable declines in major companies. Micron has dropped over 5.5%, Sandisk nearly 12%, and Nvidia over 5%. In contrast, hyperscalers are performing better, showing some gains.

Investor sentiment has been negatively impacted by reports of China's advancements in semiconductor manufacturing, particularly in developing domestic Deep Ultraviolet (DUV) lithography equipment, which poses a threat to European industry leader ASML.

Geopolitical Context

The ceasefire between the US and Iran, announced by President Donald Trump, has reduced immediate conflict escalation risks. Trump indicated that while negotiations are ongoing, the US is prepared to resume military action if necessary. This situation has eased fears of rising energy prices, which is generally positive for risk assets and could influence future Federal Reserve decisions.

However, the market remains cautious, as the ceasefire does not guarantee a long-term resolution. Should negotiations fail, tensions in the Middle East could rise again, potentially leading to increased oil prices and negative market sentiment.

Commodities and Precious Metals

In the commodities market, oil prices have sharply declined due to reduced geopolitical risk, with Brent crude experiencing a sell-off. Conversely, the precious metals market shows cautious optimism, with gold futures up about 0.5% and silver futures gaining 0.7%.

Cryptocurrency Market

The digital assets market is also reflecting positive sentiment, with Bitcoin gaining about 0.3% and Ethereum rising nearly 1%.

Conclusion

The current market dynamics are heavily influenced by geopolitical developments, particularly the US-Iran ceasefire and China's advancements in semiconductor technology. Investors are closely monitoring these factors as they could significantly impact market sentiment and economic conditions moving forward.