The Foreign Holdings Data Lands Monday at 4 p.m. The Line That Has Been Moving Is the Official One

by Jonathan Mercer · August 16, 2026

Chief Markets Correspondent, US Market Current

At 4 p.m. Washington time on Monday, August 17, the Treasury Department publishes the June installment of its Treasury International Capital data. The release lands at the closing bell, it is the only official monthly measure of who outside the United States owns Treasury debt, and the number most likely to be quoted from it — the grand total of foreign holdings — is not the number that has been moving.

Treasury's own release calendar sets the date. The department's "Release Dates of TIC Data" page lists August 17 as the August release date and September 16 as the one after it, and states that all data releases occur at 4 p.m. Washington, D.C. time. The same page describes the timing rule: monthly data on transactions in, and holdings of, long-term securities are updated each month on the 11th business day plus zero to three days, with a 1.5-month lag between the release date and the as-of date of the data. The July 14 press release carrying May's figures says it directly: "The next release, which will report on data for June 2026, is scheduled for August 17, 2026." The reference month is confirmed twice from inside Treasury.

That lag is the first thing to hold onto. Monday's file describes positions as of the end of June. It is not a read on the tape of the last two weeks, and no amount of framing will make it one.

As of the current published table — Table 5, Major Foreign Holders of Treasury Securities, whose columns run from 2025-05 through 2026-05 — foreign holders in aggregate owned $9,371.1 billion of Treasury securities at the end of May. That was up $18.5 billion from April's $9,352.6 billion, and still $118.3 billion below the February 2026 reading of $9,489.4 billion, which is the highest column on the page.

Underneath that flat-ish total, the official sector line has been sliding. The table's foreign official row stood at $3,848.0 billion in May, down $58.5 billion from April's $3,906.5 billion and down $163.0 billion from February's $4,011.0 billion. Of the thirteen monthly columns the current table publishes, May 2026 is the lowest official reading. It is also the lowest as a share: official institutions accounted for about 41.1% of foreign Treasury holdings in May 2026, against roughly 43.0% in May 2025.

The twelve-month arithmetic is the cleanest way to see it. Total foreign holdings rose from $9,021.7 billion in May 2025 to $9,371.1 billion in May 2026, a gain of $349.4 billion. Over the same stretch the official line went from $3,877.1 billion to $3,848.0 billion, a decline of $29.1 billion. The residual — everything the table does not classify as official, which is to say private foreign investors, funds and custodial accounts — went from $5,144.6 billion to $5,523.1 billion, a gain of $378.5 billion. The decomposition is forced by the table's own cells: if the total rose $349.4 billion while the official line fell, then all of the past reported year's increase in foreign ownership of Treasuries, and then some, came from outside the official sector.

The flows release tells a compatible but not identical story, and the difference is worth reading carefully. In the May press release, Treasury reported that "the sum total in May of all net foreign acquisitions of long-term securities, short-term U.S. securities, and banking flows was a net TIC inflow of $132.2 billion. Of this, net foreign private inflows were $172.0 billion, and net foreign official outflows were $39.9 billion." On the long-term securities line specifically, the release states that "foreign residents increased their holdings of long-term U.S. securities in May; their net purchases were $262.8 billion. Net purchases by private foreign investors were $246.8 billion, and net purchases by foreign official institutions were $16.1 billion."

So official institutions were net buyers of $16.1 billion of long-term U.S. securities in a month when their Treasury holdings in the holdings table fell $58.5 billion. Those two figures are not in conflict, and Table 5 itself shows why. The $16.1 billion covers all long-term U.S. securities — Treasuries, agency debt, corporate bonds and equities — and the release's summary text does not break it out by security type. The holdings table splits the official line the other way, by maturity: official holdings of Treasury bills fell from $457.3 billion in April to $396.2 billion in May, a drop of $61.1 billion, while official holdings of Treasury bonds and notes edged up from $3,449.2 billion to $3,451.8 billion. The two components sum exactly to the official totals in both months. On the table's own numbers, the official sector's May decline was a bill runoff rather than a retreat from the long end.

The flows release records a separate, differently scoped bill move: "foreign residents decreased their holdings of U.S. Treasury bills by $43.5 billion" in May, a transactions figure covering all foreign holders, official and private. It is not the same quantity as the $61.1 billion decline in official bill holdings, and neither one should be quoted as the other. (On the aggregate, Treasury states that "After including adjustments, such as estimated foreign portfolio acquisitions of U.S. stocks through stock swaps, overall net foreign purchases of long-term securities are estimated to have been $232.7 billion in May.")

The country rows in the May table have their own texture. Japan remains the largest single holder at $1,143.1 billion, but that is down $66.8 billion from April's $1,209.9 billion — the largest one-month change of any country the table names — and it leaves Japan within $0.3 billion of its May 2025 level of $1,142.8 billion. Twelve months of columns, and no net change. The United Kingdom, now the second-largest holder at $948.6 billion, is up $139.2 billion over the same year. Mainland China is at $659.3 billion against $732.7 billion a year earlier, though it is up slightly from April's $651.1 billion, which is the lowest of its thirteen columns. India dropped from $235.3 billion to $181.3 billion.

Here the data fights back against the interpretation people most want to give it. Treasury's help file on estimating these holdings is blunt about country attribution: "Some foreign owners entrust the safekeeping of their securities to institutions that are neither in the United States nor in the owner's country of residence," the department writes. That custodial bias, it says, contributes to the large recorded holdings in major custodial centers, and it names five — Belgium, the Caribbean banking centers, Luxembourg, Switzerland and the United Kingdom. Treasury adds: "Country attribution on a monthly basis is much improved with the new MFH methodology, but users should be aware that it remains imperfect."

That caveat lands directly on the fastest-growing rows. Over the past twelve reported months the United Kingdom added $139.2 billion, Belgium went from $415.5 billion to $472.0 billion, Luxembourg from $412.6 billion to $436.0 billion and the Cayman Islands from $441.2 billion to $471.3 billion, while Switzerland fell from $303.7 billion to $281.1 billion. Four of the five jurisdictions Treasury names as custodial centers grew. Whatever the growth in foreign private ownership represents, the table is least able to say whose money it is precisely where that money is showing up.

One more methodological point matters for anyone tempted to read the official decline as mark-to-market damage from higher long yields. Under the heading covering valuation in its description of the current methodology, Treasury states: "Although holdings estimates in the Major Foreign Holders tables are still a hybrid of market and face values, the potential distortions caused by differences in market and face values are much reduced in the current methodology." The same section explains that long-term Treasury holdings are collected at market value while short-dated bills are reported at face value — which matters here, because the bill line is where the official decline sat. Nor are the monthly numbers a long chain of extrapolation: each month's estimate starts from the previous month's reported survey values plus that month's net purchases, and is replaced the following month by the holdings actually reported on the next survey. That re-anchoring is why these figures get revised.

None of that makes Monday's file uninteresting; it makes it specific. The checkable questions in the June release are narrow ones: whether the official line extends its slide below $3,848.0 billion or stabilizes, whether the official bill runoff continued, and whether the private-versus-official split in the flows data looks anything like May's $172.0 billion in and $39.9 billion out. Those are answerable at 4 p.m. Monday. What the release cannot answer is what foreign buyers have done since — the following file does not arrive until September 16.

This publication does not offer investment advice, and nothing above is a recommendation. The point is narrower: the release has a scheduled time, a defined reference month, a published methodology that limits what its country rows can prove, and one line inside it that has moved considerably more than the headline.