SoftBank borrowed $11.1 billion to make its last OpenAI payment. The money was there. It cost a point more than in April.

On 24 September SoftBank Group published the terms of what Reuters, citing LSEG data, called the largest high-yield corporate bond sale on record. It raised about 11.1 billion dollars, in dollars and euros, and said exactly what the money is for: the 10 billion dollar payment for the third and final tranche of its 30 billion dollar follow-on investment in OpenAI, due to close on 1 October. The rest is for general corporate purposes.

The terms are in SoftBank's own release. In dollars: 1 billion at three and a half years paying 8.625 percent, 4.5 billion at five and a half years paying 9.25 percent, and 4.5 billion at seven and a half years paying 9.75 percent. In euros: two tranches of 500 million, at four and six years, paying 7.125 and 8 percent. S&P and Fitch both grade the notes BB+, the top of speculative grade. The bonds settle on 29 September, and SoftBank says it will cancel the last 10 billion dollars of undrawn capacity on the 40 billion dollar bridge loan it arranged in March.

The record passes Numericable's 10.9 billion dollar sale in 2014. Bloomberg reported, citing people familiar with the matter, that orders for the dollar portion topped 30 billion dollars while the deal was being marketed. Satoru Aoyama, a senior director at Fitch, told Reuters: "I was positively surprised by the market appetite."

That is the first half of the story, and it is real. A speculative-grade holding company asked for 10 billion dollars to fund a stake in an unlisted AI lab and, per Bloomberg, drew more than three times that in orders. Whatever else is true about the AI build-out this autumn, lenders have not walked away from it.

The second half is the price. In April, SoftBank's previous foreign-currency bond sale paid 7.625 percent on three-and-a-half-year dollar notes and 8.25 percent on five-and-a-half-year notes. This week the same maturities paid 8.625 and 9.25 percent: a full percentage point more, in five months. The euro notes paid between three quarters of a point and a point more. Reuters notes that a 7.3 billion dollar SoftBank sale in June 2021 yielded between 2.125 and 5.25 percent.

Is that SoftBank's credit getting worse? On this evidence, mostly not. Over the same five months, US Treasury yields for three- to five-year maturities rose by about 1.1 to 1.2 points, on the Treasury's own daily figures. SoftBank's dollar coupons rose by slightly less. The extra cost is largely the base rate everyone borrows over, which is the rates condition this map already tracks. The 10-year closed at 5.17 percent on 25 September: above the 5 percent warning level we set in advance, below the 5.5 percent line in the tracker's rates row, and inside a band we have already filed, so not a new signal.

Where the risk does rise is in the amount. SoftBank has committed 64.6 billion dollars to OpenAI and has funded it with a bridge loan, loans against its Arm and OpenAI stakes, asset sales and now bonds. Reuters reports it has issued 14.6 billion dollars of high-yield bonds this year. It had hoped for listing proceeds from OpenAI and from its data center developer, SB Energy; both listings have slipped. So the last OpenAI payment is being made with borrowed money. CreditSights' Mark Chapman wrote that risks for SoftBank's credit "are material and have increased as concentration has increased and cash flow has come under material strain."

The other side deserves equal space. S&P's Makiko Yoshimura wrote that OpenAI's delayed IPO has no immediate negative impact on SoftBank's creditworthiness, citing the strength of its Arm stake. And the counter-evidence arrived the next day: on 25 September Nscale, a British AI cloud company that has filed for a US listing, announced 3.36 billion dollars of convertible financing led by Third Point, including 1 billion dollars from Nvidia, according to TechCrunch. Capital is still reaching AI infrastructure, and quickly.

So what does this show? That the build-out can still be financed at scale, even at the riskier end of the credit market. That the price of that financing has risen with rates. And that one of OpenAI's largest backers now carries its latest payment as debt. It shows nothing about OpenAI's revenue, and nothing yet about whether the money arrives on time.

What would change the picture: the OpenAI tranche closing on 1 October, or slipping. SoftBank returning to the debt market, and at what coupon. A SoftBank-linked deal pulled, downsized or repriced. OpenAI closing the private round it has reportedly discussed.

On the map: SoftBank is yellow. This is a mixed signal, money raised and risk added, and under the map's one rule any bearish element in a meaningful signal means yellow, never green. It adds no change beyond the SB Energy signal filed alongside it. OpenAI does not change color: receiving an investment is not revenue. Nothing turns red.