Japan Exchange Group (JPX) is considering new guidelines that would block companies with over 50% of their assets in cryptocurrencies from being listed on the Tokyo Stock Price Index (TOPIX). This could impact Metaplanet, a digital asset treasury firm, which is scheduled to join TOPIX in October 2026. If the proposal is adopted, Metaplanet may face exclusion from the index, potentially triggering passive outflows from institutional investors. The move follows JPX's earlier efforts to curb crypto-linked stock volatility and protect investors. Metaplanet’s stock has already declined significantly from its 2025 highs, and the proposed rules could further affect its market performance.

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