On 16 August, in an email to subscribers, the source (U.S. Treasury Department) wrote:

Notice: Revised files on monthly holdings of long-term securities were posted on August 16, 2018 on the TIC Securities (B) webpage. The new files are marked "REVISED 8-16.." , at: https://www.treasury.gov/resource-center/data-chart-center/tic/Pages/ticsec2.aspx
-- The revised files correct computer errors in the files posted on August 15, 2018.
-- FYI: There are no changes in the Press Release of August 15. End FYI.
Sorry for any inconvenience.

In response, as regards Data Buffet's extract of the monthly TIC dataset, this impacts 11 time series from the "Major Foreign Holders" subset. We have synchronized the series. Schedules that use these series as triggers will have re-executed.

Scope of correction:

• Number of series: 11
• Date range impacted: June 2017 to June 2018
• Magnitude (max revision to any single period): Up to 0.52%

The series reside in the historical catalog (United States » Financial » Treasury International Capital » Monthly » Major Foreign Holders of U.S. Treasury Securities (M)) and are:

• XBFHAUSM.IUSA = Foreign holdings of U.S. Treasury securities: Australia - EOP, (Bil. USD, NSA)
• XBFHBMUM.IUSA = Bermuda
• XBFHCANM.IUSA = Canada
• XBFHCYMM.IUSA = Cayman Islands
• XBFHIRLM.IUSA = Ireland
• XBFHMEXM.IUSA = Mexico
• XBFHNLDM.IUSA = Netherlands
• XBFHCHEM.IUSA = Switzerland
• XBFHAREM.IUSA = U.A.E.
• XBFHOTHM.IUSA = Other
• XBFHTOTM.IUSA = Total

Because catalog locations are subject to change, the upper-right search box on DataBuffet.com provides a "find in catalog" mode that accepts a mnemonic.