Treasury Intervention: Buying Bonds and Yen, But What's Really at Stake?

U.S. Treasury Secretary Scott Bessent has been busy this summer, announcing that the Treasury will at least double the size of its liquidity-support buybacks for 10-to-30-year bonds in mid-August. This move came after 30-year Treasury yields reached their highest level since 2007.

These bond buybacks are not quantitative easing; they involve purchasing and retiring older, less-liquid securities, without reducing the government's overall borrowing requirements. The amounts involved are modest relative to the $32 trillion Treasury market, but signaling matters - long-term yields fell sharply following the announcement before much of the initial move was reversed.

The currency intervention may be related: on July 31, the U.S. Treasury sold euros from its Exchange Stabilization Fund and purchased yen alongside Japan's Ministry of Finance. This marked the first coordinated effort to strengthen the Japanese currency since 1998, which had become increasingly disorderly and was intensifying imported inflation and increasing pressure on the Bank of Japan to tighten monetary policy more aggressively.

Notably, Japan has indicated that it plans to access the Federal Reserve's Foreign and International Monetary Authorities repo facility, allowing it to borrow dollars against its Treasuries rather than sell them outright. This could be intended not only to support the yen but also to prevent instability in one market from spilling into another.