$AAPL now has a market cap equal to the entire S&P 600 Small Cap Index.
One case of Ebola in NYC has lopped off $200 bln ($200,000,000,000) in the market cap of US equities.
Yep, worst 5-day start to a year in the S&P 500's history.
Alphabet, Apple, Microsoft, & Facebook account for 48.5% of the Tech sector's market cap and 10.2% of the S&P 500. $GOOGL $AAPL $MSFT $FB