Traders work on the floor at the New York Stock Exchange (NYSE) in New York City, U.S., March 23, 2026. Brendan McDermid | Reuters

Hello, this is Leonie Kidd writing to you from London. Welcome to another edition of CNBC's Daily Open. As trading days go, yesterday is up there with the most unusual sessions of my near-20 years at CNBC. President Donald Trump's Truth Social post about a five-day halt on energy strikes in Iran sent shockwaves through the markets and the newsroom on Monday. The wild swings across asset classes were only exacerbated by denials from Iranian state media that talks had even happened. Indicators that suggest a spike in trading took place ahead of the social media post are now only adding to the confusion. Going by the 'morning-after trade,' it looks like there is a high degree of skepticism over the long-term impact of this proclamation from the U.S. President.

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