The Nikkei stock index briefly slid over 2,500 points Monday morning, hit by U.S. recession fears and sell-offs of exporter issues on the yen’s further appreciation against the U.S. dollar. The 225-issue Nikkei Stock Average dropped 1,662.14 points, or 4.63 percent, from Friday to 34,247.56, after falling to its lowest intraday level since Jan. 5. The broader Topix index was down 145.33 points, or 5.73 percent, at 2,392.27. Every industry category on the top-tier Prime Market lost ground, led by bank, insurance and securities house shares. The dollar briefly dropped to around a seven-month low…