What sector has driven much of the U.S. stock market's gains in the past decade and now accounts for about 35% of the S&P 500 and 60% of the Nasdaq-100? If you guessed technology, you're right.
While past eras of American growth were shaped by industries such as oil in the 1970s, manufacturing in the 1980s and finance in the 1990s, the 2000s, following the dot-com bust and the 2008 financial crisis, have been defined by the resurgence and dominance of tech.
