The Chicago Business Barometer, also known as the Chicago Purchasing Manager's Index, is similar to the national ISM Manufacturing indicator but at a regional level and is seen by many as an indicator of the larger US economy. It is a composite diffusion indicator, made up of production, new orders, order backlogs, employment, and supplier deliveries compiled through surveys. Values above 50.0 indicate expanding manufacturing activity.

The latest Chicago Purchasing Manager's Index, or the Chicago Business Barometer, fell to 58.2 in November from 61.1 in October, which is in expansion territory. Values above 50.0 indicate expanding manufacturing activity.

Here is an excerpt from the press release:

The Chicago Business BarometerTM, produced with MNI, slipped to 58.2 in November. The index now stands at the lowest level since August but remains in expansion.

Among the main five indicators, New Orders and Production posted the only declines, while Supplier Deliveries saw the largest gain. [Source]

Let's take a look at the Chicago PMI since its inception.

Here's a closer look at the indicator since 2000.

Let's compare the Chicago PMI with the more popular national ISM Manufacturing Index. Both indices clearly follow one another with the ISM falling slightly lower on average. Note the ISM Manufacturing indicator is through the previous month.