future revenue. Vendor performance (slower deliveries diffusion index) — This component measures the time it takes to deliver orders to industrial companies. Vendor performance leads the business cycle because an increase in delivery time can indicate rising demand for manufacturing supplies. Vendor performance is measured by a monthly survey from the National Association of Purchasing Managers (NAPM). This diffusion index measures one-half of the respondents reporting no change and all respondents reporting slower deliveries. Manufacturers' new orders for non-defense capital goods — As stated above, new orders lead the business cycle because increases in orders usually mean positive changes in actual production and perhaps rising demand. This measure is the producer's counterpart of new orders for consumer goods/materials component (#3). Building permits for new private housing units. Stock prices of 500 common stocks — Equity market returns are considered a leading indicator because changes in stock prices reflect investors' expectations for the future of the economy and interest rates. Money Supply (M2) — The money supply measures demand deposits, traveler's checks, savings deposits, currency, money market accounts, and small-denomination time deposits. Here, M2 is adjusted for inflation by means of the deflator published by the federal government in the GDP report. Bank lending, a factor contributing to account deposits, usually declines when inflation increases faster than the money supply, which can make economic expansion more difficult. Thus, an increase in demand deposits will indicate expectations that inflation will rise, resulting in a decrease in bank lending and an increase in savings. Interest rate spread (10-year Treasury vs. Federal Funds target) — The interest rate spread is often referred to as the yield curve and implies the expected direction of short-, medium- and long-term interest rates. Changes in the yield curve have been the most accurate predictors of downturns in the economic cycle. This is particularly true when the curve becomes inverted, that is, when the longer-term returns are expected to be less than the short rates. Index of consumer expectations — This is the only component of the leading indicators that is based solely on expectations. This component leads the business cycle because consumer expectations can indicate future consumer spending or tightening. The data for this component comes from the University of Michigan's Survey Research Center, and is released once a month. Lagging indicators Lagging indicators are indicators that usually change after the economy as a whole does. Typically the