Stocks posted modest losses Monday as the market digested some uninspiring economic data. The S&P 500 and the Dow Jones industrial average each fell 0.5% while the Nasdaq lost 0.3%. At the day's best, the S&P 500 had seen a gain of 0.5%, and the Nasdaq 0.7%. Volume fell on the Nasdaq but climbed on the NYSE, making for a distribution day for the NYSE composite, Dow industrials and S&P 500. The Institute for Supply Management's November