Donald Trump is pushing back hard against claims that a newly signed US-Iran memorandum of understanding includes a $300 billion fund for Tehran, calling the narrative “fake news” and warning that military action remains on the table if Iran doesn’t cooperate.

The memorandum, signed electronically around June 14-15, 2026, was supposed to mark a diplomatic off-ramp from a conflict that has simmered since late February. Instead, it has become the subject of a fierce political battle over what the US actually agreed to, and what it’s going to cost.

The $300 billion question

Reports from outlets including the New York Times and Bloomberg have pointed to a $300 billion private investment fund tied to Iranian reconstruction, with more than half of that amount reportedly already committed by private investors.

The fund’s conditions reportedly include Iranian compliance with nuclear agreements and the safe reopening of the Strait of Hormuz, the narrow waterway through which roughly a fifth of the world’s oil supply passes daily. Sanctions relief would come from Gulf states rather than from Washington directly.