Does shrinking global trade raise US borrowing costs?
Core argument: Cumulative US borrowing from the rest of the world has reached 118% of GDP since 2000, as domestic savings consistently fell short of domestic investment, with effective US net borrowing costs below zero until recently.
The size of the implicit US borrowing subsidy rose with global trade volumes. The growth in trade during the period of “globalization” was driven by the rise of globally-interconnected production networks, with production processes sliced into stages and distributed across borders. Businesses at each stage of the process would both invoice and get invoiced in dollars. This [plausibly] boosted demand for Treasuries to meet dollar payment obligations and backstop foreign banking systems, which placed downward pressure on Treasury yields and cheapened broader dollar funding costs.

