TOKYO - The Nikkei stock index on Tuesday ended above the 70,000 line for the first time since early July as optimism about artificial intelligence- and semiconductor-related shares boosted investor sentiment.

The 225-issue Nikkei Stock Average ended up 737.12 points, or 1.05 percent, from Monday at 70,683.98. The broader Topix index finished 38.34 points, or 0.92 percent, higher at 4,183.56.

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