The 30-year Treasury yield climbed to 5.31%, its highest level since 2007, as investors continued to demand more compensation for holding long-term U.S. debt. The move comes even as recent data point to softer retail sales and a cooling labor market, suggesting the bond selloff is being driven by forces beyond near-term U.S. growth.

One source of pressure is the global bond market. Higher yields in Japan and other major developed economies are pushing up the returns investors expect across long-term debt markets, including Treasurys. Fiscal concerns in the U.S., Japan, the U.K. and Europe are adding to the repricing, making it harder for U.S. bonds to attract buyers without offering higher yields.

The outlook for Fed policy is another risk. If the U.S. economy stays resilient and financial conditions remain loose, demand could keep inflation above target and force the Federal Reserve to keep rates higher for longer — or even deliver more hikes than markets currently expect. A similar repricing in early 2024 pushed the 10-year Treasury yield sharply higher as traders backed away from expectations for rapid Fed cuts.

Long-term bonds also face a growing supply problem. Heavy government borrowing means investors have to absorb more debt, while demand for longer maturities has shown signs of weakening at recent auctions. If inflation stays elevated or energy prices rise again, investors could demand an even larger term premium. That leaves the 30-year yield vulnerable to another move higher, with some strategists seeing 5.60%-5.70% as a potential target.