Downgrades, bad reports, rising dollar push stocks down

Stocks fell Tuesday as worries about several world economies sent investors running to the safety of the U.S. dollar and Treasuries. Disappointing reports from key U.S. companies 3M Co. (MMM) and McDonald's (MCD) also increased fears that companies will be hard pressed to produce real profits next year as the economic recovery limps along.

The Dow Jones industrial average ($INDU) fell 104 points, or 1%, to 10,285. The Standard & Poor's 500 index ($INX) fell 11 points, or 1%, to 1,091. The the Nasdaq ($COMPX) composite index fell 16.6 points, or 0.76%, to 2,173. The Dow was down as much as 140 points in morning trading.