Less than a week after the U.S. and Iran signed their "memorandum of understanding" aimed at ending the conflict, tensions have flared once again.

Trump and Vance fought back criticisms the U.S. gave "too much" to Iran in the 14-point MOU, while traders are pricing in expectations of potential rate hikes

Negotiators call off plans to meet in Switzerland to try to progress the U.S.-Iran deal as Trump and Vance defend the agreement.