Treasury just doubled its long-term debt buyback cap — from $2B to at least $4B per operation starting September 9th. They're targeting 10-year to 30-year bonds, explicitly to support liquidity at the long end.

Context: 30-year yields hit their highest level since 2007 this week. After the announcement, they dropped as much as 9 basis points to 5.19%. The 2s30s curve flattened by 7 bps. Equities and gold both rallied.

Markets are calling this "QE Lite" — though it's not technically QE. Treasury buybacks don't reduce federal debt or expand the Fed's balance sheet. But the signal is clear: Treasury is stepping in more aggressively as pressure builds on the long end.

This is about managing the curve and keeping long-duration debt from spiraling. Whether you call it liquidity support or something else, the playbook is shifting.