SoftBank has raised $11 billion through a high-yield bond offering to help finance its OpenAI stake, with reported yields as high as 9.75%. The borrowing brings a sharp question into focus: how much of SoftBank’s AI ambition depends on OpenAI’s valuation holding up?
SoftBank Watch analysis
What happened
The Observer’s Lionel Barber reports that SoftBank has borrowed heavily to finance its 13% stake in OpenAI. The article says the $11 billion bond offering was among the largest junk-bond sales in history and carried yields of up to 9.75%. It also describes a $25 billion margin loan against SoftBank’s Arm stake and a separate $10 billion loan linked to OpenAI shares, which the article says are not collateral for that loan.
The Observer puts OpenAI’s current value at about $850 billion and says SoftBank is planning an IPO timetable around 2027. Those are figures and expectations reported in the article, not guaranteed future outcomes.
Why it matters
SoftBank’s AI strategy spans chips, models, data centres and robotics, but the Observer argues that its exposure to OpenAI is now central to the financial story. If the value of its assets falls, borrowing against them can become harder to manage. The article says SoftBank’s own loan-to-value figure is 13%, while credit-rating agencies calculate it higher because they count some margin loans.
That makes this more than a wager on whether AI will prove useful. It is also a wager on whether the businesses and assets backing that investment can support the borrowing used to fund it.
Our read
The scale of the bet is striking, but the useful question is not simply whether SoftBank is bullish on AI. It is how much financial room the company has if valuations, fundraising or expected revenues disappoint. The Observer sets out a case for both the risk and the ambition; neither a soaring valuation nor a large loan, on its own, settles the outcome.
What to watch
- Whether SoftBank discloses further borrowing or changes to its OpenAI stake.
- How its loan-to-value position compares with credit-rating agencies’ calculations.
- Whether the planned OpenAI IPO proceeds on the reported timetable.
- Whether data-centre and energy projects deliver the revenues SoftBank expects.
Discussion spark: Should SoftBank’s borrowing to fund AI be judged mainly by the value of its assets today, or by whether those AI investments can generate durable returns?
Sources and evidence
- SoftBank’s great gambler bets his reputation on OpenAI – The Observer (18 October 2026, 04:33 UTC)
not affiliated with or endorsed by SoftBank