The Nikkei stock index climbed 26 percent in 2025 from a year earlier to close at a record year-end high above 50,000 on Tuesday, helped by an artificial intelligence boom and expectations for economic measures under Prime Minister Sanae Takaichi.Tokyo stocks, meanwhile, fell on the final trading day of 2025, with the 225-issue Nikkei Stock Average ending down 187.44 points, or 0.37 percent, from Monday at 50,339.48. The broader Topix index finished 17.55 points, or 0.51 percent, lower at 3,408.97.Japanese financial markets will be closed from Wednesday through Friday for the New Year holid…READ FULL ARTICLE