Around $2.3 trillion has been wiped off the value of the Magnificent 7 this month as the tech giant's huge infrastructure spending is increasingly scrutinized by investors, who see stronger returns in other parts of the market. The Mag 7 comprises Microsoft, Nvidia, Alphabet, Apple, Meta, Tesla and Amazon. The CNBC Magnificent 7 Index has fallen 10% so far in June. These companies, in particular A...