The idea at the heart of the index is a good one.

It will not give us a cost of living index.

Anything under 25 is considered a normal reading of the index.

A new reading of the index was due out the following day.

But they now account for half the entire value of the index.

In fact, the concept of index does not make sense.

Last year, a record 58 changes were made in the composition of the index.

The average annual return of the index was 12.3 percent from 1970 through June 30 this year.

Technology stocks have become a much larger part of the index.

Now, those five stocks account for about 40 percent of the index.