in 1979 Carter froze Iranian assets in the US - to the tune of about 1.9 billion dollars - no where near the 150 billion Obama gave them.  World wide Iran had approx 100 billion frozen.  The largest portion of the Iranian assets frozen in the US were unfrozen in 1981. ranian frozen assets in international accounts are calculated to be worth between $100 billion[1][2] and $120 billion.[3][4] Almost $1.973 billion of Iran's assets are frozen in the United States.[5] According to the Congressional Research Service, in addition to the money locked up in foreign bank accounts, Iran's frozen assets include real estate and other property. The estimated value of Iran's real estate in the U.S. and their accumulated rent is $50 million.[1] Besides the assets frozen in the U.S., some parts of Iran's assets are frozen around the world by the United Nations.[1] Iran's assets were first frozen by U.S. president Jimmy Carter in 1979, after revolutionaries overthrew the U.S.-allied Mohammad Reza Shah Pahlavi's administration and took American hostages. After the Iranian Revolution in 1979, the United States ended its economic and diplomatic ties with Iran, banned Iranian oil imports and froze approximately 11 billion 1980-US dollars of its assets.[6] Many of the assets were then unfrozen in 1981 after the Algiers Accords were signed and the hostage crisis ended.[dubious – discuss] At the time of the 1979 revolution, the Pentagon re-sold some $400 million in Iranian military equipment already paid for by the deposed government, and the money was "placed in an escrow account".[1] Much of the frozen cash includes Iran's income from selling a limited amount of oil prior to the lifting of the sanctions, when Iran could legally sell oil but could not transfer the money back to Iran, because doing so was illegal under U.S. sanctions.[2] https://en.wikipedia.org/wiki/Iranian_frozen_assets