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Dow Sinks, Nasdaq Holds Up After Trump's Iran Comments; Sandisk Rises

US stock indexes declined on Monday following President Trump's comments on Iran, with the Dow Jones Industrial Average falling while the Nasdaq composite managed to hold onto some gains. Meanwhile, Sandisk stock rose, ending a losing streak.

July 20, 2026
2 min read
Source: Investor's Business Daily
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Major US stock indexes declined on Monday, weighed down by President Donald Trump's comments regarding Iran. The Dow Jones Industrial Average fell sharply, while the Nasdaq composite held up the best among the major indexes, managing to post gains. At the same time, Sandisk stock rose, ending a losing streak.

Possible Reasons

The negative market moves came after President Trump's remarks suggesting possible military action against Iran. These comments raised investor concerns about escalating geopolitical tensions in the Middle East, which could impact oil prices and global economic stability.

Context

Despite the overall decline, the Nasdaq showed relative resilience, supported by major technology stocks such as NVIDIA (NVDA), Micron (MU), and AMD (AMD). This performance comes in the context of a week that saw market volatility due to economic data and earnings reports.

Similar Moves in the Sector

In the technology sector, Sandisk stock rose after a period of decline, indicating a potential improvement in investor confidence toward the company. Other semiconductor stocks also had mixed performance, with some benefiting from increased demand for chips.

Frequently Asked Questions

Indexes declined due to President Trump's comments on Iran, raising fears of geopolitical escalation.

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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.