Five biggest companies in the S&P 500

There’s a distinction to be made between the S&P 500 Index’s five biggest companies and all the rest, according to BCA Research. The firm compared the total market value of the five -- Amazon.com Inc., Apple Inc., Facebook Inc., Google owner Alphabet Inc. and Microsoft Corp. -- with the value of the other 495 companies in a chart last week. The top five’s value increased 266% from the start of 2015 through Tuesday, according to data compiled by Bloomberg. In the same period, the value of the rest rose just 25% -- and the entire gain occurred after the S&P 500 set this year’s low in March.