Dow drops more than 550 points — tech shares get pummeled

Dow drops more than 550 points — tech shares get pummeled: Stocks fell on Tuesday, giving up earlier gains, as investors worried about rising interest rates and reacted to comments on a conference call from bellwether Caterpillar that hinted economic growth may slow later in the year. The Dow Jones industrial average traded 584 points lower as of 2:39 p.m. ET after rising as much as 131 points shortly after the open of trading. The S&P 500 fell 1.9 percent. The Nasdaq composite declined 2.2 percent as shares of Facebook, Amazon, Alphabet and Netflix all dropped more than 4 percent. See original work for more on this and other stories.