EL7.AI
StocksMediumUpdated•Originally published 9 September 2026•Updated 9 September 2026•
2 min read

SoftBank Shares Jump 5% to ¥6,884 Despite Stronger Japanese Currency

Key Facts

1Tokyo-listed SoftBank rose 5% and traded at ¥6,884 at about 10:15 Japan time.
2The stock was up nearly 38% from its September 3 close of ¥5,001, not from the start of the month.
3SoftBank reported net asset value of ¥72.30 trillion as of June 30, 2026, including an adjusted Arm holding value of about ¥49.91 trillion.

Tokyo-listed SoftBank Group shares rose 5% and traded at ¥6,884 at about 10:15 Japan time on Wednesday. That put the gain at nearly 38% from the September 3 close of ¥5,001, not from the start of the month as previously stated.

The advance came as the dollar traded near ¥153.3 and the Japanese currency approached its strongest level in about 7 months. Yen appreciation creates a translation headwind for SoftBank when it reduces the yen value of dollar-denominated assets, assuming their underlying prices are unchanged.

Invezz linked the buying to a re-rating of the group's AI exposure after OpenAI launched GPT-6 Astra on September 3 and as Arm shares gained. That remains a market interpretation, not evidence that a single factor caused the rally.

SoftBank's disclosures show why its asset portfolio matters to that valuation. The group reported net asset value of ¥72.30 trillion as of June 30, 2026, including an adjusted Arm holding value of about ¥49.91 trillion. On July 1, it also executed a $10.0 billion second tranche of a planned $30.0 billion follow-on investment in OpenAI.

SoftBank's valuation reflects a combination of asset prices, the dollar-yen exchange rate and net debt. Gains in AI-linked holdings can outweigh a stronger yen during a particular session, but currency movements still affect the group's yen-denominated net asset value.

Investors will watch whether the shares retain their gains, alongside Arm's performance, OpenAI developments and the yen's direction. Those variables provide a clearer risk framework than assuming a fixed stock-currency relationship or treating AI optimism as the rally's sole cause.