Is there an AI stock market bubble, and is it ready to burst?

Despite the Iran war, rising inflation and worries about rising government debt, US stock markets continue to hit all-time highs this year. That's largely driven by the huge boom in investment in Artificial Intelligence.

The apparent mismatch between sky high stock market valuations and the real economy is beginning to set off some alarm bells ringing among investors. BBC's Samira Hussain reports from Wall Street.

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