John C. Williams is President and CEO of the Federal Reserve Bank of San Francisco.

Gauge for goods sold at retail outlets in the past month. Retail Sales is a leading indicator for the economy. Rising consumer spending fuels economic growth, confirms signals from consumer confidence, and may spark inflationary pressures.

The headline figure is expressed as the percentage change from the same month last year.

A component of the Consumer Price Index (CPI) that measures changes in prices for new homes. Higher housing prices suggest stronger consumer demand and growth in the housing market. At the same time, higher housing prices that accompany economic expansion often lead to inflationary pressures. The headline number is the percentage change in the index.

Note: The New Housing Price Index takes into account the quality and features of the new homes sold. For example, if selling prices for new homes are unchanged, but the features and quality of housing have increased (e.g. added swimming pool and better construction materials), then the price for new homes is considered to have fallen.

A monthly index released by the Institute of Supply Management which tracks the amount of manufacturing activity that occurred in the previous month.ISM Manufacuring assesses the state of US industry by surveying executives on expectations for future production, new orders, inventories, employment and deliveries. This data is considered a very important and trusted economic measure. If the index has a value below 50, due to a decrease in activity, it tends to indicate an economic recession, especially if the trend continues over several months. A value substantially above 50 likely indicates a time of economic growth. The values for the index can be between 0 and 100.

Values over 50 generally indicate an expansion, while values below 50 indicate contraction.