ISM manufacturing index misses expectations at 48.7 in October versus the 49.5 figure expected and 49.1 in September. Tariff uncertainty continues to weigh on the sector and hiring and capex remain effectively frozen as manufacturing decision-makers hope for clarity, ISM says.

The dip in the manufacturing index in the latest month reflect declines in production and inventories.

All four demand indicators (New Orders, New Export Orders, Backlog of Orders, and Customers' Inventories indexes) improve although they remain in contraction. The Customers' Inventories Index contracts at a slower rate.

On the output side, production deteriorated and employment contracted at a slower pace as 67 percent of panelists say managing head count remains in effect at their companies, as opposed to hiring.

Inputs (defined as supplier deliveries, inventories, prices and imports), are mixed, with the Supplier Deliveries Index indicating slower deliveries, the Inventories Index contracting at a faster rate, and the Prices Index continuing to indicate pricing increases, but at a slower rate. The Imports Index contracts again but at a slower pace.

An ISM official tells reporters the US-China deal looks like a good start toward reducing the uncertainty level facing manufacturing but firms worry it will be reversed and need to see it implemented. They also need to see things settle down generally on the trade front before hiring can recover, and certainly before any of the hoped-for reshoring of manufacturing can occur.

The consensus sees another month of marginal contraction at 49.5, pretty steady from 49.1 in September.

The manufacturing composite index from the Institute for Supply Management is a diffusion index calculated from five of the eleven sub-components of a monthly survey of purchasing managers at roughly 300 manufacturing firms nationwide. The survey queries purchasing managers about the general direction (tracked in volumes) of production, new orders, order backlogs, their own inventories, customer inventories, employment, supplier deliveries, exports, and imports. Data on changes in input prices (prices paid) are also tracked. The five components of the composite index are new orders, production, employment, supplier deliveries, and inventories (their own, not customer inventories). The five components are equally weighted. The questions are qualitative rather than quantitative; that is, they ask about the general direction rather than the specific level of activity. Each question is adjusted into a diffusion index which is calculated by adding the percentage of positive responses to one-half of the unchanged responses.

Investors need to keep their fingers on the pulse of the economy because it dictates how various types of investments will perform. By tracking economic data such as the ISM manufacturing index, investors will know what the economic backdrop is for the various markets. The stock market likes to see healthy economic growth because that translates to higher corporate profits. The bond market prefers less rapid growth and is extremely sensitive to whether the economy is growing too quickly and causing potential inflationary pressures.

The ISM manufacturing data give a detailed look at the manufacturing sector, how busy it is and where things are headed. Since the manufacturing sector is a major source of cyclical variability in the economy, this report has a big influence on the markets. More than one of the ISM sub-indexes provide insight on commodity prices and clues regarding the potential for developing inflation. The Federal Reserve keeps a close watch on this report which helps it to determine the direction of interest rates when inflation signals are flashing in these data. As a result, the bond market is highly sensitive to this report.

Importance
The ISM manufacturing composite index indicates overall factory sector trends. The relevance of this indicator is enhanced by the fact that it is available very early in the month and is not subject to revision.

Interpretation
The bond market will rally (fall) when the ISM manufacturing index is weaker (stronger) than expected. Equity markets prefer lower interest rates and could rally with the bond market. However, a healthy manufacturing sector, indicated by rising ISM index levels, bodes well for corporate earnings and is bullish for the stock market.

The level of the ISM manufacturing index indicates whether manufacturing and the overall economy are growing or declining. Historically, readings of 50 percent or above are associated with an expanding manufacturing sector and healthy GDP growth overall. Readings below 50 indicate a contracting manufacturing sector but overall GDP growth is still positive until the ISM index falls below 42.5 (based on statistics through January 2011). Readings in between these two levels suggest that manufacturing is declining while GDP is still growing but only very slowly.

In addition to the ISM manufacturing composite index, the various sub-components contain useful information about manufacturing activity. The production component is related to industrial production, new orders to durable goods orders, employment to factory payrolls, prices to producer prices, export orders to merchandise trade exports and import orders to merchandise imports.

Vendor (supplier) deliveries are an important component of report. The more slowly orders are filled and delivered, the stronger the economic growth and the greater the potential for inflation. When orders are filled quickly, it means that producers don't have as many to fill.

The ISM manufacturing composite index and its sub-components can be subject to some monthly volatility, making the three-month average of the monthly levels more indicative of the trend.