Iran says it is reviewing a U.S. ceasefire proposal but firmly denies President Trump's claims that talks are underway with Tehran desperate to strike a deal. Stocks fall and oil rises as investors reassess the odds of a ceasefire with former Goldman Sachs CEO Lloyd Blankfein telling CNBC investors should tread carefully. G7 foreign ministers arrive for a key summit in France, as conflicts in the Middle East and Ukraine dominate the agenda. NATO's Supreme Allied Commander for Transformation tells CNBC the military alliance is confronting new forms of warfare and urges Europe to take on a greater leadership role.

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The U.S. government has reportedly provided Iran with a peace proposal even though Tehran continuously denies direct talks are happening. President Trump voices optimism that a deal can be struck. Oil prices fall as a result with Brent settling near the $100-mark while European and U.S. futures move to the green on hopes of de-escalation in the Gulf. Shell CEO Wael Sawan has warned that Europe could face potential fuel shortages by next month should the conflict continue while TotalEnergies CEO Patrick Pouyanné told CNBC at CERAWeek in Houston that refining margins are soaring to unprecedented levels.

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Iran denies it is in negotiations with Washington as President Trump announces he has postponed airstrikes on critical power plants and energy facilities in the country for five days and claims a peace deal could be close. Oil prices rebound following an initial drop in the price of Brent to below $100 for the first time in almost a fortnight on the back of Trump’s comments. US and European futures point south, giving back some of Monday’s gains. Apollo Global caps withdrawals from a $25bn private credit fund after investors sought more than 11 per cent of the total following its first monthly loss in more than three years.

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