The agreement comes as US and Iranian officials prepare to launch talks in Switzerland on Friday aimed at reaching a final settlement to their conflict.
Negotiations over a final deal are to start immediately after a signing ceremony and continue during a 60-day window, leading to decisions on the fate of Iran's nuclear programme and a plan for the lifting of international economic sanctions.
A source knowledgeable about the negotiations told Reuters that the proposed fund, known as the Reconstruction and Development Fund, is designed to attract investment into Iran and that more than half of the planned $300 billion has already been committed.
The new fund is a private investment vehicle, not a reconstruction or reparations programme.
It will not include any government money or grants, the source said, adding that companies based in the US, the Gulf Arab states, Asia, South America, and Africa have agreed to commit financing.
Investments pledged span energy, logistics, manufacturing, and transport, the source said.
According to a senior Iranian source, Tehran initially sought $400 billion in compensation from Washington for damages caused by the war.
However, the United States rejected direct compensation payments, leading negotiators to develop the investment fund mechanism instead.
Under the proposed structure, regional countries would contribute through a range of financial measures, including securing loans, establishing credit lines, and directly financing reconstruction projects.
The funding would support the rebuilding of facilities damaged during the conflict, including the Mobarakeh Steel complex, refineries, airports, and other key infrastructure, according to the Iranian source.
Separate reports citing a draft version of the agreement indicate Iran would be allowed to resume oil exports immediately under an interim deal with the US.
It remains unclear whether the text published by Bloomberg is identical to the version electronically signed on Monday, as announced by US President Donald Trump.
A formal signing ceremony is scheduled to take place in Switzerland on Friday.
Trump has pledged to release the text of the memorandum "within two days" and said he may read the document publicly. He also stated that the agreement would be submitted to Congress for review.
According to the document published by Bloomberg, the framework agreement includes the following key provisions:
• The United States, Iran, and their respective allies would declare an immediate and permanent end to the war on all fronts.
• Washington, Tehran, and their allies would commit to refraining from any hostile actions or threats against one another.
• The United States and Iran would seek to reach a comprehensive final agreement within 60 days, with the possibility of extending the deadline.
• The United States would immediately lift its naval blockade of Iran upon the signing of the memorandum of understanding.
• Washington would withdraw its forces within 30 days of the conclusion of a final agreement.
• Iran would work to restore maritime traffic within 30 days, subject to the removal of obstacles and operational requirements.
• The United States would cooperate with regional partners to support Iran's reconstruction and economic development.
• Washington would commit to lifting sanctions on Iran according to a timetable to be agreed upon as part of the final settlement.
• Iran would reaffirm its commitment never to develop or produce nuclear weapons.
• Tehran and Washington would negotiate the future of Iran's enriched nuclear material and other outstanding nuclear issues as part of a final agreement.
• Both sides would maintain the status quo until a permanent agreement is reached.
• Iran would retain its current nuclear programme, while the United States would refrain from imposing additional sanctions or increasing its military presence.
• Washington would exempt Iranian oil exports and related banking services from sanctions.
• The United States would release Iranian funds and assets currently frozen under sanctions.
• Formal negotiations on a final agreement would begin once implementation guarantees for key provisions of the framework are secured.
• Any final agreement between Washington and Tehran would be endorsed through a binding resolution of the United Nations Security Council.
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