"Stock prices posted modest gains today after Federal Reserve Chairman Alan Greenspan said the economy is slowing its torrid pace but not heading into recession.</br></br>The central bank's chief also said the Fed might hold interest rates steady as the economy cools down.</br></br>The Dow Jones industrial average ended up 9.08 points at 3973.05. Advancing issues led declining ones by about 5 to 4 on the New York Stock Exchange. Trading volume climbed to 339.2 million shares from 308.1 million Tuesday.</br></br>Blue-chip issues made the strongest gains, but broad market indexes also moved higher. The NYSE's composite index rose 1.06 to 263.04, the Standard & Poor's 500-stock index added 2.33 to 485.07 and the Nasdaq index gained 3.31 to 787.93. The American Stock Exchange index climbed 1.07 to 448.58.</br></br>""Greenspan didn't say anything that upset the apple cart, so it gave us a little extra boost,"" said Peter Coolidge, senior equity trader at Brean Murray, Foster Securities."