Tokyo stocks plunged from their all-time highs on Friday, with the Nikkei index suffering its biggest one-day point drop in more than three years, as exporters were hit by a stronger yen and a sharp drop in U.S. tech shares overnight, prompting investors to take profits from recent gains. The 225-issue Nikkei Stock Average ended down 1,033.34 points, or 2.45 percent, from Thursday at 41,190.68, posting its steepest fall since Feb. 26, 2021. The broader Topix index finished 34.61 points, or 1.18 percent, lower at 2,894.56. On the top-tier Prime Market, decliners were led by insurance, electric …