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Hello, this is Leonie Kidd writing to you from London. Welcome to another edition of CNBC’s Daily Open.

It’s the most significant development since the onset of the war in Iran, and markets are reacting. The news that a truce has finally been reached between the U.S. and Iran, with Israel’s support, has triggered a wave of relief across equity markets.

Some wildcard factors remain, but for now the ceasefire is being met with optimism.

“I agree to suspend the bombing and attack of Iran for a period of two weeks.” The words of U.S. President Donald Trump in a post on Truth Social marked the announcement of a ceasefire between the U.S. and Iran. “We received a 10 point proposal from Iran, and believe it is a workable basis on which to negotiate.”