The US Treasury raised the maximum size of its liquidity-support buyback operations for 10- to 30-year nominal coupon securities from $2 billion to at least $4 billion per operation, effective September 9. The move came as the 30-year yield was trading near 19-year highs. Following the announcement, the 30-year yield dropped nearly 9 basis points, falling below 5.20 percent, and equities opened higher.
When long-end Treasury yields fall sharply, borrowing costs ease for corporations and homebuyers, which tends to lift stock valuations and ease pressure on bond portfolios holding long-duration assets. Investors in long-term bond funds and rate-sensitive equities like utilities and real estate investment trusts felt the most direct relief. The move signals that the Treasury is willing to act tactically when long yields become disorderly, which reduces the tail risk of a yield spike derailing the broader market.
September 9: First buyback operation under the new $4B+ ceiling takes effect. Next 30-year Treasury auction (typically monthly, watch Treasury's auction calendar for the exact date). October FOMC meeting: October 28-29.
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