What is the Philadelphia Semiconductor Index?

It is an index of 30 major semiconductor companies, used as a gauge for the sector's performance.

How did geopolitical events affect oil prices?

Iran's expanded attack raised supply disruption fears, pushing oil prices higher.

Were Meta, Netflix, and Intuitive Surgical affected by the decline?

Yes, these stocks were caught in the broader market downturn despite no company-specific news.

US Equity Indexes Fall as Chipmakers Enter Bear Market, Oil Surges

US equity indexes declined as chipmaker stocks entered a bear market, while crude oil prices surged following Iran's expanded attack in the Middle East.

July 17, 2026

2 min read

Source: MT Newswires

US equity indexes fell sharply today as chipmaker stocks entered a bear market, while crude oil prices surged after Iran expanded its attack in the Middle East.

Reasons for the Move

The decline in equity indexes was driven by a steep sell-off in the semiconductor sector, with the Philadelphia Semiconductor Index (SOX) falling more than 20% from its recent highs, indicating a bear market. Meanwhile, crude oil prices jumped sharply as Iran widened its offensive in the Middle East, raising concerns about supply disruptions.

Context

Over the past week, US indexes have been volatile as investors weighed economic data and geopolitical developments. Stocks of companies like Meta Platforms (META), Netflix (NFLX), and Intuitive Surgical (ISRG) were caught in the broader market downturn.

Similar Moves in the Sector

The technology sector faced similar pressure, with other chipmakers like NVIDIA and AMD also declining. In contrast, energy stocks rose on the back of higher oil prices.

Frequently Asked Questions

They fell due to chipmaker stocks entering a bear market and a surge in oil prices after Iran expanded its attack.

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This article was rewritten in Wrqti's editorial style based on information from the original source above. Content is informational only — not investment advice.