SoftBank Shares Plunge 59% Since June as Debt-Funded AI Bets Slide

The company’s shares dropped 10.8% on Friday, extending a downward trend that has erased 59% of SoftBank’s value since early June. The volatility follows a series of aggressive AI bets, including a $64B investment in OpenAI, funded by $40.4B in new debt acquired over the last 12 months.

The selloff was compounded by a 51% decline in the share price of Arm since June 30, which weakened the valuation of SoftBank’s asset backing. As bond prices fell and credit-default swaps rose, SoftBank reported a leverage ratio of 13%, keeping it below its internal 25% limit.

How we got here

Late-cycle leveraged-credit and private-credit bifurcation

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How it could play out

−0.2%Impact on the S&P 500 across 4 scenarios (−1.4% to +1.2%)

Scenarios

Each figure is the modeled move of the S&P 500 if the outcome occurs. For information only. Not investment advice.

How it could play out

Scenarios

Story, how it could play out

4 ways this could read

Possible futures, not reported news · chances and moves from Tilt’s model

+0.3%
Managed SoftBank Deleveraging
SoftBank responds to the share-price collapse by slowing new AI commitments, selling liquid holdings, and reassuring bondholders. This is the most likely path because Masayoshi Son has historically used asset sales and portfolio monetization to defend liquidity during drawdowns.
Technology +0.7%
−1.4%
AI Valuation Slump
Investor concern shifts from SoftBank-specific leverage to the valuation of private AI companies and listed AI infrastructure suppliers. Cash-burn projections through 2030 and junk-bond financing keep pressure on the AI complex.
Technology −2.6% · Finance −0.5% · Telecommunications −0.2%
−0.6%
Credit Stress Broadens
Bond investors become more concerned that SoftBank’s AI financing strategy has increased refinancing and collateral risks. This scenario is less likely than managed deleveraging but plausible because the September junk-bond raise directly links the equity selloff to credit-market confidence.
Technology −1.1% · Finance −0.8%
+1.2%
AI Confidence Rebounds
A new funding signal from OpenAI, a strategic partner, or a major cloud customer restores some confidence that AI demand can support current investment plans. This is less likely immediately after a 59% SoftBank drawdown, but a credible equity commitment could reverse part of the rout.
Technology +2.4% · Finance +0.3%

Each figure is the modeled move of the S&P 500 if it happens. For information only. Not investment advice.

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