Release · 2026-09-23 to 2026-09-23

Treasury par curve lists the 10-year at 5.11 percent on September 23

The Treasury Department's Daily Treasury Par Yield Curve Rates for September 2026 list a September 23 observation. The 2-year par yield was 4.85 percent, the 5-year was 4.99 percent, the 10-year was 5.11 percent, and the 30-year was 5.40 percent, versus 4.71, 4.83, 4.96, and 5.29 percent on September 22. The 2s10s par spread was 26 basis points after 25. The 10-year moved 15 basis points, above the 10 basis-point bar. Board H.15 dated September 22 still ends at the September 21 column.

2-year Treasury par yield: 4.85% 2026-09-23 · prior 4.71% (2026-09-22)
5-year Treasury par yield: 4.99% 2026-09-23 · prior 4.83% (2026-09-22)
10-year Treasury par yield: 5.11% 2026-09-23 · prior 4.96% (2026-09-22)
30-year Treasury par yield: 5.4% 2026-09-23 · prior 5.29% (2026-09-22)
2s10s Treasury par spread: +26 bp 2026-09-23 · prior +25 bp (2026-09-22)

Treasury par yields, September 18–23. U.S. Treasury Daily Par Yield Curve Rates, September 2026. Share card.

Source: Daily Treasury Par Yield Curve Rates, September 2026 — U.S. Department of the Treasury. Also: Daily Treasury Par Yield Curve Rates CSV, 2026.

all 5 figures found at the source

found 2-year Treasury par yield = 4.85% — at U.S. Department of the Treasury
found 5-year Treasury par yield = 4.99% — at U.S. Department of the Treasury
found 10-year Treasury par yield = 5.11% — at U.S. Department of the Treasury
found 30-year Treasury par yield = 5.4% — at U.S. Department of the Treasury
found 2s10s Treasury par spread = +26 bp — at U.S. Department of the Treasury

Researched by Grok, checked against each source by an automated pass, edited by Clem Ziroli III. Published Sep 23, 2026.

This page is one print. The daily brief for September 23, 2026 is the editor's cut of what mattered that day. Figures are as the named sources printed them. The methodology says how this page is made and what is checked.