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SoftBank seeks more than $11 billion of junk bonds to fund its OpenAI bet

One of the largest high-yield deals ever offered arrives as the Fed tightens and global high-yield funds record their biggest outflow in six months.

Assembled by Claude from 14 sources at 14 outlets · Monday, September 21, 2026, Morning edition, 10:28 AM EDT · no human byline

Disclosure. This item was assembled by an AI from the RSS excerpts of the outlets tagged inline. No human wrote or checked it before publication. Feed selection and categories are editorial choices by Teresa Lo. Nothing here is investment advice.

What happened

SoftBank is seeking to borrow more than $11bn in what would be one of the largest high-yield bond deals ever sold to investors ft.com. The company announced plans to issue over $11 billion in junk bonds on 20 September 2026 gurufocus.com. Bloomberg reported the group seeking the equivalent of more than that amount as Masayoshi Son's conglomerate ramps up its investments in ChatGPT creator OpenAI bloomberg.com. A term sheet showed a launch of over $10 billion in bonds for the OpenAI investment charlotteobserver.com.

Part of the proceeds is earmarked for additional investments in OpenAI news.futunn.com. Traders Union described the sale as one of the largest junk bond sales in the market tradersunion.com. Business Today reported it as among the largest high-yield bond offerings on record, citing Bloomberg and people familiar with the matter, and noted that the sale comes as the billionaire deepens the bet businesstoday.in. Reported sizes differ slightly: the Financial Times and Traders Union put the target at more than $11bn ft.comtradersunion.com, while the term sheet showed over $10 billion charlotteobserver.com, and Investing.com reported the figure as more than $11 bln citing Bloomberg investing.com. Japanese coverage carried the size at over $11 billion, and noted that SoftBank is one of the world's largest investors in AI, with fortunes that track that exposure japantimes.co.jp.

The credit terms

SoftBank carries a BB+ rating from S&P Global Ratings, which places the deal firmly in high yield finance.biggo.com. Fitch rated the group's proposed US dollar and euro notes BB+ marketscreener.com. Investing.com noted that the deal would rank among the largest high-yield bond offerings and highlighted the growing role of debt in financing AI investments investing.com. BigGo Finance said the rating reflects the growing use of debt across the sector finance.biggo.com. The same coverage recalled Son's stated ambition for a $1 trillion AI mega-hub in Arizona marketscreener.com.

Why it matters to investors

The financing mix for AI is changing. One analysis framed the build-out as becoming a credit market stress test, noting that hyperscaler issuance is accelerating sharply thedarksideoftheboom.substack.com. Goldman Sachs expects US hyperscalers to deploy $1.4T in capital in 2027 as artificial intelligence shifts from experimentation to wider deployment tradingview.com.

The demand side is thinner than it was. Global high-yield bond funds recorded their largest outflow in six months at $2bn this week, coinciding with the Fed's rate hike investmentguruindia.com. The same note described US flows rebounding after the Fed decision while emerging market and high-yield funds faced redemptions investmentguruindia.com.

Sources

  1. ft.com: SoftBank seeks to raise $11bn in one of biggest ever high-yield bond deals (2026-09-21)
  2. tradersunion.com: SoftBank seeks over $11bn in high-yield bonds to fund OpenAI investment - Traders Union (2026-09-21)
  3. gurufocus.com: SoftBank Plans $11 Billion Junk Bond Offering to Fund OpenAI Investment - GuruFocus (2026-09-21)
  4. bloomberg.com: SoftBank Seeks Over $11 Billion in Junk Bonds for OpenAI Bet - Bloomberg.com (2026-09-21)
  5. finance.biggo.com: SoftBank Launches Over $11 Billion Bond Sale to Fund OpenAI Stake - BigGo Finance (2026-09-21)
  6. marketscreener.com: Fitch Rates SoftBank Group's Proposed US Dollar, Euro Notes BB+ | MarketScreener (2026-09-21)
  7. japantimes.co.jp: SoftBank seeks over $11 billion in junk bonds for OpenAI bet - The Japan Times (2026-09-21)
  8. charlotteobserver.com: Softbank Group launches over $10 billion in bonds for OpenAI investment , term sheet shows (2026-09-21)
  9. businesstoday.in: SoftBank plans $11 billion junk bond sale to fuel multi billion dollar OpenAI bet: Report (2026-09-21)
  10. news.futunn.com: SoftBank Seeks Over $11 Billion in Junk Bond Financing; Bets on OpenAI and Arm Share ... (2026-09-21)
  11. investing.com: SoftBank plans more than $11 bln bond sale to fund OpenAI bets, Bloomberg reports (2026-09-21)
  12. thedarksideoftheboom.substack.com: AI's $5 Trillion Buildout Is Becoming a Credit Market Stress Test (2026-09-20)
  13. tradingview.com: Goldman Sachs expects U.S. hyperscaler capex to reach $1.4T by 2027 - TradingView (2026-09-21)
  14. investmentguruindia.com: The Alternate Opinion :US flows rebound post-Fed, but EM & High yield face redemption (2026-09-21)