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Dollar weakens as US tariffs struck down, Iran tensions rise

The Supreme Court ruled Trump's tariffs exceeded legal authority, weakening the dollar by about 0.4% amid ongoing U.S.–Iran nuclear talks and market uncertainty.

  • On Friday, the U.S. Supreme Court struck down President Donald Trump's tariffs in a 6-3 ruling authored by Chief Justice John Roberts, ruling the 1977 emergency law exceeded presidential authority.
  • Section 122 provides an untested law allowing tariffs up to 15% but requiring congressional approval after 150 days, and President Trump said on Saturday he would raise the temporary tariff to 15%.
  • Markets showed a mixed response as the euro , the Japanese yen , bitcoin fell 5.11%, and the Mexican peso weakened.
  • Thousands of companies have filed lawsuits over tariffs, with litigation possibly lasting years, while the European Parliament postponed a Monday vote and the U.S. State Department withdrew non-essential staff from the U.S. embassy in Beirut.
  • With talks set for Thursday in Geneva, traders watch as President Trump said he would pursue other 'legally permissible' tariffs during the 150-day window.
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Dollar weakens as US tariffs struck down, Iran tensions rise

·United Kingdom
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CNBC broke the news in United States on Monday, February 23, 2026.
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