Data delayed. The source data for this chart is late, so it still shows the last good version, which runs to 2026-10-28. It updates on its own when the data arrives.
Source: US Treasury Monthly Statement of the Public Debt and auctions; NY Fed SOMA holdings, Monetary Macro. As of 2026-10-28. Released 2026-10-29.
From 2001, each week starts from the official month-end stock in the Treasury's Monthly Statement of the Public Debt (which includes buybacks and inflation adjustments), adds auctions settled since, and removes securities that have matured.
Before 2001 the series is an approximation rebuilt from auctions alone. Treasury auction data begins in October 1979, so securities issued earlier (for example the long bonds of the 1970s) are missing, and buybacks are not applied. The method can be checked from 2001, where it lands within 1.4% of the official total at every month-end (98.6% to 101.4%). Before 2001 it cannot be checked: the rebuild starts from zero in October 1979, so the early 1980s are materially understated, and the gap narrows as the older securities mature.
TIPS are shown at inflation-adjusted principal. Excluding SOMA removes the Federal Reserve's holdings (par plus inflation compensation) by product, available from 2003.