Investors on Edge as Dow Futures Dip Amid Debt Ceiling Uncertainty.

The stock market retreated as investors await the outcome of the debt ceiling. Retail sales data showed a modest increase in spending in April, while Home Depot cut its forecasts for the year. Treasury Secretary Janet Yellen warned that the US could become unable to pay its bills as soon as June 1 if Congress doesn't raise the federal borrowing limit. The S&P 500 slipped 0.4%, while the Nasdaq Composite was about flat, and the Dow industrials fell 0.7%.