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Magnificent 7 market value down $2.3 trillion in June as AI investment doubts grow

The market capitalisation of the so-called Magnificent 7 U.S. tech stocks fell by $2.3 trillion in June. CNBC reported that investors are rechecking whether big tech can recoup heavy spending on AI infrastructure, even as money continues to flow into semiconductors. The CNBC Magnificent 7 Index fell 10 percent in June. In contrast, the Philadelphia Semiconductor Index rose about 6 percent over the same period, and is up more than 90 percent this year.