Chinanews Client March 23 (Xie Yiguan) On March 23, the three major US stock indexes opened lower. The S & P 500 index fell 38.30 points, or 1.66%, to 2266.62 points at the opening. The Nasdaq index fell 42.50 points, or 0.62%, to 6,87.06 points. The Dow Jones index fell 359.20 points, or 1.87%, to 18814.77 points.