The Dow Jones Industrial Friday afternoon was on track to registered its worst weekly decline in about 8 months, according to FactSet data. The Dow DJIA, -1.92% was down about 622 points, or 2.5%, at 24,323, with that drop contributing to a 1,219 points loss over the course of the abbreviated week(the stock and bond markets were closed on Wednesday to mark a day of mourning for George H.W. Bush on Wednesday). If it holds, it would represent the steepest weekly slump since the week ended March 23. The blue-chip index's decline has come amid intensifying worries that global growth is likely to slow in the coming year or two, with a clash between China and the U.S. likely contributing mightily to those fears. Those concerns were dragging the S&P 500 index SPX, -2.37% and the Nasdaq Composite Index COMP, -3.01% sharply lower, with all three benchmarks on track to produce weekly declines of nearly 5%. The S&P 500 and the Nasdaq also are headed for their worst weekly drop since late March.