Nikkei plans to reduce Advantest's weight in the Nikkei 225 index starting in October 2026 due to the company's stock exceeding the 10% cap limit set in 2022. As of July 31, 2026, Advantest accounted for 12.2% of the index based on its closing share price. The Nikkei 225 uses a price adjustment factor to calculate its value, and this factor will be reduced from 7.2 to 6.4 beginning in October. The cap rule has been previously applied to other companies such as Fast Retailing in 2024 and during the 2025 spring review. Further adjustments or removal of the cap will be determined during the semiannual reviews scheduled for next spring.
Bias read (Center): The article provides a factual account of a technical adjustment to the Nikkei 225 index, explaining the reasons behind the change and referencing previous applications of the cap rule. There is no evident framing or slant toward any particular political or economic ideology.


