The Nikkei stock index tumbled for a second straight day to a new eight-month low Friday amid heightening global fears of an economic slowdown triggered by U.S. President Donald Trump's tariff measures.The 225-issue Nikkei Stock Average ended down 955.35 points, or 2.75 percent, from Thursday at 33,780.58, its lowest closing since Aug. 5. It lost 3,339 points over the course of the week, the largest ever weekly loss for the index, according to SMBC Nikko Securities Inc.The broader Topix index finished 86.55 points, or 3.37 percent, lower at 2,482.06. Most industry sectors lost ground on the…READ FULL ARTICLE