Japan’s Nikkei stock index briefly slid over 2,000 points Friday morning to a six-month low, in a global market rout stirred by concerns over a recession in the United States after weaker-than-expected economic data. The 225-issue Nikkei Stock Average fell 1,864.48 points, or 4.89 percent, from Thursday to 36,261.85, after hitting its lowest level since Feb. 7 on an intraday basis. The broader Topix index was down 126.18 points, or 4.67 percent, at 2,577.51. A risk-off mood prevailed, with every industry category on the top-tier Prime Market losing ground, led by securities house, insurance an…