President Trump's H-1B visa crackdown wiped $100bn off market value of America's largest corps, top study finds

White House immigration restrictions knock less than half a per cent off

The Trump administration's June crackdown on foreign workers with H-1B and other visas wiped $100bn off the stock market value of the largest US companies, according to boffins at The Brookings Institution, Harvard Business School, and The Wharton School of the University of Pennsylvania....