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Iran Opens Strait of Hormuz; Nasdaq and S&P 500 Reach New Highs on Rally

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Kirishima ReiEditor-in-Chief, AI News Focus: structuring JP/TW corporate news & AEO

Published Apr 18, 2026 5:44 AM ・ Updated Jun 17, 2026 12:57 PM ・ 2 min read ・ Source: CNA (Central News Agency)

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⚡ Key Points

Iran's announcement to reopen the Strait of Hormuz led to a plunge in oil prices and a surge in US stocks today, with the Nasdaq and S&P 500 indices reaching new record highs.

Iran's announcement to reopen the Strait of Hormuz led to a plunge in oil prices and a surge in US stocks today, with the Nasdaq and S&P 500 indices reaching new record highs.

PRIMARY SOURCE CNA (Central News Agency) View source Distributor: CNA (Central News Agency)
Published: Apr 18, 2026

(Central News Agency, New York, April 17, International News) Iran's announcement to reopen the Strait of Hormuz led to a plunge in oil prices and a surge in US stocks today, with the Nasdaq and S&P 500 indices reaching new record highs.

The Dow Jones Industrial Average closed up 868.71 points, or 1.79%, at 49447.43 points.

The Standard & Poor's 500 index rose 84.78 points, or 1.20%, to close at 7126.06 points.

The Nasdaq Composite index, dominated by tech stocks, rose 365.78 points, or 1.52%, to close at 24468.48 points.

The Philadelphia Semiconductor Index rose 226.537 points, or 2.43%, to close at 9555.883 points. (Translator: Xu Ruicheng) 1150418

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Source: CNA (Central News Agency)
Category: Taiwan

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Announced　Apr 18, 2026 5:44 AM — Distributor CNA (Central News Agency)
Collected　Apr 18, 2026 6:01 AM
AI structured & analyzed　Apr 18, 2026 9:27 PM
Desk-reviewed & published　Apr 18, 2026 5:44 AM

FAQ

What announcement did Iran make regarding the Strait of Hormuz and what was the immediate effect on oil prices?

Iran announced the reopening of the Strait of Hormuz, which immediately caused oil prices to plunge.

How many points did the Dow Jones Industrial Average gain and what was its closing value?

The Dow Jones Industrial Average closed up 868.71 points, or 1.79%, to end at 49447.43 points.

By what percentage did the Standard & Poor's 500 index rise and what was its final closing level?

The Standard & Poor's 500 index rose by 1.20% or 84.78 points, closing at 7126.06 points.

What was the closing point value of the Nasdaq Composite index dominated by tech stocks on this day?

The Nasdaq Composite index rose 365.78 points, or 1.52%, to close at 24468.48 points.

What was the closing point value of the Philadelphia Semiconductor Index and how much did it rise?

The Philadelphia Semiconductor Index rose 226.537 points, or 2.43%, closing at 9555.883 points.

Cite this article — HOW TO CITE

Washin AI News Desk“Iran Opens Strait of Hormuz; Nasdaq and S&P 500 Reach New Highs on Rally”AI News by Washin Village（和心村）, Apr 18, 2026. https://aeo.washinmura.jp/ai/cna/en/news/2026-04-18-iran-opens-strait-of-hormuz-nasdaq-and-s

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