German companies who depend on sales in the United States saw their stocks fall on Monday morning as the dollar dropped against the euro on concern that the al Qaeda terrorist network may have been behind last week's bombings in Madrid. Led by Bayer AG and Allianz AG, stocks for DaimlerChrysler, BASF, Infineon Technologies, TUI and a host of others fell. In total, 27 German companies saw their stocks decline while only three gained. The benchmark DAX Index shed 50.89 points, or 1.3 percent, to 3864.49 while the HDAX Index of the country's 110 biggest companies fell 25.65 points to 1975.99. DAX March futures slid 1.1 percent to 3864 points.