“Asian Oil Exporters” always was a geographically accurate yet still somewhat misleading subcategory of the Treasury International Capital (TIC) data release.
Technically, the Gulf is in Asia, and Asian oil exporters were a set of countries that could be differentiated from African oil exporters. But the title wasn’t terribly helpful either. Not for a set of countries—the GCC countries (Saudi Arabia, the United Arab Emirates, Qatar, Bahrain, Oman, and Kuwait), Iraq, and Iran—in what more commonly is called the Middle East.
And, thanks to a wise decision by the U.S. Treasury to release the disaggregated data, it will soon be only of historic interest. The Treasury didn’t just release the current Treasury security holdings (or to be more precise, their holdings of Treasury securities in U.S. custodial accounts) for individual Gulf and Caribbean countries, it also released the historical time series. That is the way to immediately establish the credibility of a data series (Take note, for example, of the difficulty in interpreting China’s Special Data Dissemination Standard [SDDS] release, including the lines on China’s forward book, without back data).
So, shock of all shocks, we now know Iran doesn’t own any Treasuries. At least not any in U.S. custodial accounts.
The real story in the data, though, is the lack of any real story. The Gulf countries do not keep that many Treasuries in U.S. custodial accounts, so there wasn’t much for the disaggregated data to reveal.
That has long been apparent from the aggregated data. The $250 billion or so of Treasuries held by “Asian oil exporters” was small relative to combined reserves of these countries (excluding Iran, for obvious reasons) of around $1 trillion. And after say 2010, the changes in the Gulf’s combined Treasury holdings haven’t even really moved with their reported reserves.