Nasdaq 100

NDX - comprised of the 100 largest stocks (based on market capitalization) traded on the Nasdaq National Market. The NDX is a modified market cap weighted index. Every stock in the index is represented in proportion to its market capitalization (the value of the total shares outstanding). The NDX value is modified to keep any large issues from having an overwhelming effect on the performance of the index. The actual computation methods are proprietary to the Nasdaq.

Sector % of Index
Computer Hardware 37.2%
Computer Software 19.3%
Consumer Services 14.6%
Healthcare 13.7%
Media 5.4%
Business Services 4.2%
Telecommunications 3.0%
Industrial Materials 2.3%
Energy 0.3%

Nasdaq 100 Component Weighting
Nasdaq 100 Component Performance