4 ms·> Microsoft, IBM, and Sun Did not make up 20% of SPX in 1999. FB, AAPL, MSFT, GOOG and AMZN do.by quickthrowman 6y ago> Microsoft, IBM, and Sun Did not make up 20% of SPX in 1999. FB, AAPL, MSFT, GOOG and AMZN do.