SoftBank shares fell 6.9% on October 22, 2026, taking their decline from a June 2 all-time high to 50% as investors questioned the sustainability of large artificial-intelligence investments amid higher borrowing costs. The Tokyo-based group’s market capitalization stood at about ¥24.7 trillion ($157 billion).
Key Takeaways
- SoftBank’s market value has halved since its June peak.
- Weakness in CoreWeave bonds has heightened concerns about financing AI expansion.
- SoftBank completed its latest $30 billion OpenAI investment commitment on October 1.
Table of Contents
- SoftBank shares lose ground after June high
- AI financing concerns extend beyond SoftBank
- Completed OpenAI investment shows the scale of exposure
- Conclusion
SoftBank shares lose ground after June high
The October 22 decline extended a sharp reversal for SoftBank, which briefly overtook Toyota Motor as Japan’s largest company by market capitalization roughly four months earlier. Its market value was now below those of Hitachi and Recruit Holdings.
Earnings from US megacap companies had not eased concerns over AI spending. The selloff reflects a reassessment of SoftBank’s listed equity value; it does not, by itself, establish a corresponding fall in the value of each underlying investment.
| Item | Details |
|---|---|
| Latest share move | Down 6.9% on October 22, 2026. |
| Peak-to-date decline | 50% below the June 2, 2026, all-time high. |
| Market capitalization | Approximately ¥24.7 trillion ($157 billion). |
| OpenAI investment status | $30 billion additional commitment completed on October 1, 2026. |
AI financing concerns extend beyond SoftBank
Industry concerns intensified after bonds issued by US cloud-computing provider CoreWeave fell to levels associated with financial distress. That weakness drew attention to the financing risks accompanying the AI infrastructure buildout.
Higher borrowing costs add to scrutiny of the capital needed to fund expansion. However, the available trading figures do not establish how much of SoftBank’s decline was attributable to CoreWeave’s bond weakness or any single financing concern.
Completed OpenAI investment shows the scale of exposure
SoftBank’s October 1 investment completion announcement confirmed that it had paid the final $10 billion tranche of a $30 billion additional investment in OpenAI through SoftBank Vision Fund 2. The payment brought its cumulative OpenAI investment to $64.6 billion and its ownership stake to approximately 13%.
SoftBank said proceeds from foreign-currency senior notes funded the final tranche. This provides a concrete connection between its AI investment program and debt financing, without establishing that the company itself faces the distress signaled by CoreWeave’s bond prices.
The company also said it canceled the remaining $10 billion of undrawn capacity under its $40 billion bridge facility on September 30. Together with previously announced early repayments, that brought the bridge facility to a fully repaid position.
Conclusion
SoftBank shares have surrendered half their value from the June peak even as the group completed its latest OpenAI commitment. Further investment and financing disclosures will provide the next evidence for assessing its AI exposure; the share-price decline alone does not establish the condition of its balance sheet.
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