The 10-year Treasury yield faces a key test at 4.8%, a level that Matt Maley, chief market strategist at Miller Tabak + Co., says could create meaningful problems across other asset classes if breached on a sustained basis. The level matches the high reached in January 2025. Maley said rising fiscal deficits, heavy Treasury issuance and corporate borrowing are keeping pressure on long-term yields, while efforts by the U.S. Treasury Department and Secretary Scott Bessent to talk rates lower have so far failed to produce the desired decline. The intervention came while investors were heavily short Treasurys and summer trading was relatively thin, but it did not generate the hoped-for bond rally. The U.S. budget deficit and national debt, now above $40 trillion, are competing with corporate borrowers for investor demand. More than $8.4 trillion of U.S. government securities are scheduled to roll over between now and year-end, while September could be a record month for high-grade corporate issuance. Goldman Sachs has raised its forecast for USD investment-grade issuance in 2026 to $2.3 trillion. The fiscal pressure also extends to Japan, the U.K., France and other developed economies, contributing to a broader shift in global bond markets as investors seek greater compensation for holding government debt. Michael Chen, general manager of Noah ARK Hong Kong, said a disorderly rise in long-term yields could reprice ultra-long-duration bonds, high-valuation growth stocks, commercial real estate and some private assets. He favors gold and hard currency as structural hedges, remains underweight ultra-long-duration Treasurys, and maintains exposure to quality equities, real assets and AI-related physical infrastructure including electricity, power grids, energy storage and data centers. HSBC raised its end-2026 forecast for the 10-year Treasury yield to 4.65% from 4.30%, citing a higher structural floor for long-term yields and a more hawkish distribution of possible monetary-policy outcomes. It also raised its end-2026 forecast for 10-year German Bund yields to 3% from 2.8% and remained cautious on long-end bonds across developed markets. Maley said bearish sentiment and stretched positioning could still produce a sharp, tactical rally in Treasury futures, but a near-term decline in yields would not resolve the longer-term fiscal problem without serious changes to government finances.