Mexico taps global bond markets for massive debt buyback amid rating pressure

Mexico just pulled off one of the larger sovereign debt maneuvers in recent memory, issuing $13.8 billion in new bonds across US dollar and euro denominations. The purpose: buying back existing debt that’s coming due soon, while credit rating agencies sharpen their knives.

The buyback targets roughly $9.9 billion in notes maturing between 2026 and 2029. In plain terms, Mexico is swapping out debt that’s about to come due for longer-dated obligations, buying itself breathing room at a moment when the fiscal picture looks increasingly uncomfortable.

The Pemex problem that won’t go away

At the center of this story, as it has been for years, sits Petróleos Mexicanos. Pemex, the state-owned oil giant, carries one of the heaviest debt loads of any energy company on the planet. And the Mexican government has made clear, repeatedly, that it will backstop the company rather than let it sink.

Moody’s apparently thinks we’re getting close to that point. The agency downgraded Mexico’s sovereign credit rating from Baa2 to Baa3 in May 2026, citing fiscal vulnerabilities and the ongoing need to prop up Pemex. Baa3 is the lowest rung of investment-grade territory. One more notch down and Mexico enters junk status, which would trigger forced selling by institutional investors who are mandated to hold only investment-grade debt.

Standard & Poor’s has been slightly more generous, maintaining a BBB rating on Mexico. But it slapped a negative outlook on that rating. The message: things could get worse before they get better.

Why the bond swap matters

Mexico’s strategy here is straightforward, even if the execution involves moving around billions of dollars. By retiring bonds that mature in the next few years and replacing them with longer-dated paper, the government reduces near-term refinancing risk. When $9.9 billion in debt is coming due in a tight window, the last thing you want is to be forced into the market at an unfavorable moment.

The $13.8 billion issuance in September 2025 was substantial by any measure. The fact that Mexico could place that much paper across both dollar and euro markets suggests investor appetite for Mexican sovereign debt remains intact, at least for now.

The fiscal tightrope

Mexico’s broader fiscal picture adds layers of complexity to this transaction. The government has consistently chosen to support Pemex rather than allow the company to restructure independently or seek private capital.

The Moody’s downgrade to Baa3 crystallizes this dynamic. Mexico is now one downgrade away from losing investment-grade status entirely, a threshold that would reshape how global capital flows into the country. Many pension funds, insurance companies, and sovereign wealth funds operate under mandates that prohibit holding sub-investment-grade debt. A downgrade to junk would force these institutions to sell Mexican bonds, potentially flooding the market and driving prices down sharply.

That scenario remains hypothetical for now. But the negative outlook from S&P suggests it’s not as hypothetical as Mexico’s finance ministry might prefer.

Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our Editorial Policy.