America loses its captive creditors, and the Treasury market will never be the same

For decades, the US government enjoyed a borrowing privilege that most countries would kill for: a massive chunk of its creditors didn’t really care about getting a good deal. Foreign central banks bought Treasuries to manage currency reserves. The Federal Reserve hoovered them up for monetary policy. These “captive creditors” weren’t shopping for yield. They were buying because their mandates told them to. That era is over. The share of US Treasury debt held by these policy-driven buyers has collapsed from north of 50% to below 15%, a structural shift that fundamentally changes how the world’s most important debt market functions. The numbers behind the exodus Foreign governments once accounted for more than 40% of outstanding Treasuries, excluding the Fed’s own holdings. That figure has now dropped below 15%. The dollar amounts held by these official institutions haven’t cratered in absolute terms, but the denominator has exploded. US government debt has ballooned so dramatically that foreign central banks’ steady purchases now represent a shrinking sliver of an ever-larger pie. Meanwhile, the Fed has been actively shrinking its balance sheet, shedding roughly $1.5 trillion in Tr...