Biggest S&P 500 heavyweights bring back memories of 1999

Companies that carry the most weight in the S&P 500 Index are getting heavier. Alphabet Inc., Google’s owner, joined with Inc., Apple Inc., Facebook Inc. and Microsoft Corp. account for 16.6% of the S&P 500’s value, according to data compiled by Bloomberg. Their share surpassed every year-end total for the S&P 500’s five most heavily weighted companies since 1999, when it amounted to 16.7%. Microsoft is the only top-five holdover from 20 years ago. Cisco Systems Inc., Exxon Mobil Corp., General Electric Co. and Walmart Inc. were the others.