The EU has pledged to buy $750 billion of energy from the U.S. in exchange for a lower rate tariff rate in its trade deal, but analysts say this is unrealistic.

President Donald Trump and EU Commission President Ursula von der Leyen announced a trade deal framework setting a 15% baseline tariff on most EU goods, down from Trump's planned 20% tariff.

"I think it's the biggest deal ever made," Trump said of the new agreement, which will reduce the bloc's tariff rate to 15 percent.