Abstract: MSCI Japan implements one ADD, Kokusai Electric, and two DELETEs, JFE Holdings and Seibu Holdings, on 1 Sep 2026. We review the completed bridge against nine prior cycles. Kokusai Electric added +2.8% alpha over the bridge on top of its +13.5% pre-announcement run. Both DELETEs were near flat over the bridge after negative announcement days. Historically, positive-bridge ADDs gave back in the first implementation week. The historical DELETE first-week record after a positive bridge is flat.
JFE, Kokusai Electric, Seibu
Research on index reviews and inclusion events across Asia Pacific, including MSCI, Hang Seng (HSI, HSCEI, HSCI), HS TECH, CSI 300, STAR50, NIFTY and Stock Connect changes. Coverage runs from rebalance forecasts through post-announcement positioning, pre-implementation updates and post-implementation reviews, using the price patterns of past events.
Interested in the full report? Get in touch with our team.