The U.S. manufacturing sector index ended 2008 on a grim note, according to the ISM. The December report was weaker than expected and the weakest since June 1980. The Institute for Supply Management reported Friday that its manufacturing sector index came in at 32.4 during December, from 36.2 in November and 38.9 in October. It had been expected to stand at 35.4. A reading above 50 signals expansion in manufacturing; below 50 signals contraction. Below, economists react.

Much weaker than expected report, with the composite index falling another four points to 32.4. Lower levels than this have only been seen in a handful of months during the 1980, 1973-75, and 1948-49 recessions, and the key orders and production gauges hit record lows. The manufacturing sector is clearly in the midst of one of its worst downturns ever. … The weakness in December was nearly as broadly based as it could be, with not a single sector reporting growth. – Morgan Stanley Fixed Income Economics

The price paid index plummeted to 18, the lowest since June 1949 and the third lowest ever. That fully two-thirds of the respondents reported pay lower prices for supplies in December than in November underscores the seriousness of the deflation threat now confronting the economy. The global scope of the recession now underway has undermined an important prop for the U.S. economy, in general, and the manufacturing sector in particular. – David H. Resler, Nomura Economic Research

Robust export demand had been the main support for U.S. manufacturing for many months. Now, with economic activity weakening sharply in many of the United States’ main export markets, exports have begun to drop, with the pace of decline set to accelerate significantly in the months ahead. – Joshua Shapiro, MFR Inc.

This echoes the readings on manufacturing activity from Europe, where a December survey of European purchasing managers fell to 33.9—underscoring the global nature of the economic contraction. – RDQ Economics

Overall, the ISM data … suggest we may see the deepest recession since the early 1980s, and if it lasts until the fall or winter of 2009 as we fear, it would be the longest recession since the 1930s. However, the downturn is not likely to be anywhere near as deep as what we saw during the Depression. The larger risk in our view is the Japan-like syndrome — a long recession followed by an extended period of weak growth. – Michael T. Darda, MKM Partners"