Wall Street edges lower; Walgreen weighs

NEW YORK (Reuters) - The S&P 500 and the Nasdaq fell but the Dow was little changed on Monday the start of what is expected to be a light trading week ahead of Thursday's Christmas holiday as investors look ahead to corporate earnings and details on retail sales.

* One of the country's largest drug store chains, Walgreen Co , posted earnings below forecasts and oil prices stabilized on Monday, which could ease fears of weakening global demand.

* Shares of American International Group rose after the company agreed to sell its HSB Group to German reinsurer Munich Re for $742 million.

* The Dow Jones industrial average <.DJI> edged up 6.21 points, or 0.07 percent, at 8,585.32. The Standard & Poor's 500 Index <.SPX> fell 1.57 points, or 0.18 percent, at 886.31. The Nasdaq Composite Index <.IXIC> slumped 2.64 points, or 0.17 percent, at 1,561.68.

(Reporting by Deepa Seetharaman; Editing by Tom Hals)