The lagging index comprises indicators that move only after turning points in the economy, confirming the new trend.

The index comprises a basket of shares, the numbers of which are based on the constituent weights and index value at the time of readjustment.

The index comprises 100 of the largest Nasdaq companies, as measured by market value.

The index comprises a set of broker-traded debt instruments widely followed and quoted by several market makers.

A unique key index comprises a single column or a set of columns in a single database table.

The index comprises 17 commodity futures that are continuously rebalanced:

The index comprises three constituents each from five the five sub-sectors, with equal sector weightings.

The cyclical index, measuring the performance of companies that are particularly sensitive to economic movements, comprises 30 stocks, including Ford, Hewlett-Packard and International Paper.

Mr. Rubin said the Fast index currently comprises 600 million documents.

The index currently comprises 24 commodities from all commodity sectors - energy products, industrial metals, agricultural products, livestock products and precious metals.