Acting US SecDef Chris Miller has ordered the USS Nimitz to halt its routine redeployment

  • Nimitz was scheduled to leave the Gulf
  • Staying on due to Iran's recent threats against Trump and others in the US government

This may well have been a factor in the yen strengthening a little in the past hours or so.

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As a factor to consider, this time last year the US killed Iranian Maj Gen Qasem Soleimani