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Global Credit: AI Debt, Fed Credibility, and Where Value Sits | EP 230
October 7, 2026

A year ago, global credit spreads were tight and the risks that mattered most were barely in the headlines. Global credit analysts Sandro Morassutti and Marty Lee revisit these themes: the debt funding the AI build-out, the credibility of the Fed and the U.S. government, and fiscal and geopolitical pressure, and assess how each has evolved. They explain why record corporate bond supply has not yet pushed spreads wider, why most of this year’s move has come from government yields rather than credit, and where they are finding value today. Above all, they return to a simple idea: the job is not to predict the next dislocation, but to be positioned with the quality and liquidity to act when one arrives.

Key Takeaways

  • A year ago the global credit team was leaning conservative and flagging risks that were getting little airtime: the debt funding the AI build-out, the credibility of the Fed and the U.S. government, and fiscal and geopolitical pressure. Twelve months on, those themes are front-page news.
     
  • The AI data centre build-out has been bigger than expected in the bond market. Hyperscalers that historically borrowed little have come to market at sovereign scale, helping push U.S. corporate supply to about $1.7 trillion, up 27% year over year and on track for a record.
     
  • Despite that supply, spreads have stayed at multi-decade tights. Investment-grade spreads sit around 80 basis points and high yield is tighter year to date, so the team sees limited compensation for reaching down in quality or out in duration.
     
  • Most of this year’s move in yields has come from government bonds, not credit spreads. Sovereign yields hit multi-decade highs in the U.K., Japan, and elsewhere, which is why a credit benchmark can post a negative return even with spreads this tight.
     
  • The Fed held its independence with a surprise hike, but the team’s concern has shifted to credibility, term premium, and who is seen to be setting the long end. That backdrop helped push the U.S. 10-year through 5%.
     
  • Geopolitical risk is not being priced directly in credit. Citing ECB research on this year’s Iran conflict, the team notes spreads repriced far less than history would imply and snapped back quickly, a buy-the-dip reflex in credit that could reverse sharply if a shock persists.
     
  • The team favours short-dated, high-quality credit, has added only modest duration (from about 1.2 years to just over 2), and continues to find one-off opportunities, with high-yield exposure rising from roughly 8-9% to 15-16%. The aim is to hold the liquidity and capacity to buy a dislocation rather than be forced to sell into one.
     
A transcript of this episode is available below, modified for a more enjoyable reading experience. For more posts exploring the ideas we talk about in the episode, check out our Related Reads links.


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This blog post is solely intended for informational purposes and should not be construed as individualized investment advice, research, or a recommendation to buy, sell or hold specific securities. Information provided reflects current views based on data available at the time or writing and may change without notice. Mawer Investment Management Ltd. and/or its clients may hold positions in the securities mentioned, which may create a potential conflict of interest. While efforts are made to ensure accuracy, Mawer Investment Management Ltd. does not guarantee the completeness or accuracy of this information and disclaims liability for any reliance placed on the publication. Mawer Investment Management Ltd. is not liable for any damages arising out of, or in any way connected with, its use or misuse.
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This blog post is solely intended for informational purposes and should not be construed as individualized investment advice, research, or a recommendation to buy, sell or hold specific securities. Information provided reflects current views based on data available at the time or writing and may change without notice. Mawer Investment Management Ltd. and/or its clients may hold positions in the securities mentioned, which may create a potential conflict of interest. While efforts are made to ensure accuracy, Mawer Investment Management Ltd. does not guarantee the completeness or accuracy of this information and disclaims liability for any reliance placed on the publication. Mawer Investment Management Ltd. is not liable for any damages arising out of, or in any way connected with, its use or misuse.