The Institute for Supply Management (ISM) released its Non-Manufacturing Report on Business for September 2015 on Monday, October 5, 2015, as this Weekly Economic Commentary was prepared for publication. It showed that the service sector remains robust, with the non-manufacturing ISM hitting 56.9, which over time, is consistent with real gross domestic product (GDP) of 3.5%. However, the report, as usual, was largely ignored by market participants, even though non-manufacturing activity (mainly the service sector) represents 70% of the U.S. economy. Financial markets, however, correctly focus more closely on ISM’s Manufacturing Report on Business, as S&P earnings — which over time, drive stock prices — are much more closely correlated to the manufacturing portion of the economy than to the service side. But for those concerned about a U.S. recession, the recent data on both the non-manufacturing and manufacturing ISMs are comforting. As noted above, the non-manufacturing ISM readings of 56.7 in September and 57.3 so far in 2015 indicate fairly robust economic activity continues in 70% of the U.S. economy. The manufacturing ISM data, however, are more concerning. Released last week, the manufacturing ISM for September 2015 came in at 50.2, below the consensus of economists as polled by Bloomberg News (50.6) and the August 2015 readingof 51.1. In fact, the September 2015 reading on the ISM was the lowest since May 2013, and indicates that the manufacturing economy, which accounts for just 30% of the U.S. economy.