The Treasury buyback trade: how $4 billion in bond operations moved Bitcoin 8% in a day

The U.S. Treasury doubled its long-end buyback operations on Aug. 19, compressing yields and triggering the largest single-day crypto rally since March. This is the plumbing story nobody else traced. Summary The U.S. Treasury announced it will at least double the maximum size of its liquidity support buyback operations for 10-to-20-year and 20-to-30-year nominal coupon securities from $2 billion to at least $4 billion per operation, effective Sep. 9 through Nov. 4, 2026. The 30-year Treasury yield fell from a 19-year high of 5.34% to 5.19%, a drop of roughly 15 basis points from the Tuesday peak and 9 basis points on the announcement day alone. Bitcoin rallied 8.2% in under 12 hours, moving from an intraday low of $64,100 to a peak of $69,500, its highest level since early June. Forced short liquidations totaled $1.44 billion across major exchanges, with $1.29 billion closing within a single hour, the fastest concentrated squeeze of 2026. U.S. spot Bitcoin ETFs recorded a combined $487 million in net inflows across Aug. 17 and 18, with BlackRock IBIT capturing $143.6 million on Aug. 18 alone, confirming institutional participation before the rally accelerated. On Aug. 19, 2026, Tre...