Yesterday afternoon, the S&P 500 closed at a record high, and is up over $1.5 trillion since the start of 2017. "And the companies doing the most to drive that rally are all tech firms," reports The Verge. "Apple, Alphabet, Facebook, Amazon, and Microsoft make up a whopping 37 percent of the total gains." From the report: All of these companies saw their share prices touch record highs in recent months. This is in stark contrast to the rest of the U.S. economy, which grew at a rate of less than 1 percent during the first three months of this year. That divide is the culmination of a long-term trend, according to a recent report featured in The Wall Street Journal: "In digital industries -- technology, communications, media, software, finance and professional services -- productivity grew 2.7% annually over the past 15 years...The slowdown is concentrated in physical industries -- health care, transportation, education, manufacturing, retail -- where productivity grew a mere 0.7% an 查看全文>>