The US Treasury announced the index value under the index contingency clause of inflation-protected Treasury bonds. The index value for October 2025 is 325.604, the US Treasury said in a press release. For payment obligations that rely on the October 2025 CPI, the Treasury will base its calculations on this index value. Even if the US Bureau of Labor Statistics (BLS) later releases the actual CPI for October 2025, the Treasury will not replace this index number.