A roadside financial data monitor in Tokyo shows the Nikkei Stock Average on Oct. 6, 2025 rising above the 47,000 line for the first time, gaining more than 2,000 points. (Kyodo)

TOKYO - The Nikkei stock index jumped over 4 percent to close at a record high on Monday, as the yen weakened to near the mid-150 range against the U.S. dollar, fueled by optimism following the ruling party's election of fiscal dove Sanae Takaichi as its new leader.

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