Maybe he should stop trying to reassure people.

Wall Street Downdraft Continues (washingtonpost.com) Wall Street roared into reverse again this morning, backing over President Bush as he tried futilely to talk up the economy.
While the president was on television promoting his optimistic outlook a different picture crawled across the bottom of the screen, showing the Dow Jones industrials heading toward its first six-day losing streak since January and the Standard & Poors 500 stock index sinking below 900 for the first time since 1997.
Shortly after 2:20 p.m., the Dow was off 378 points (over 4 percent) to 8,305; the Nasdaq had fallen 47 (more than 3 percent) to 1,326 and the S&P was at 883, after losing 38 points (more than 4 percent).