(Bloomberg) — For most of the past decade, a handful of high-flying technology companies have pushed the US stock market to record highs and become cornerstones of investment portfolios. But that’s collapsed this year.Most Read from BloombergHow a Highway Became San Francisco’s Newest ParkAmerica, ‘Nation of Porches’Power-Hungry Data Centers Are Warming Homes in the NordicsMaryland’s Credit Rating Gets Downgraded as Governor Blames Trump NJ Transit Train Engineers Strike, Disrupting Travel to N
