Has rising asset demand outpaced supply enough to drive interest rates down?
Core argument: Since the early 1980s, asset demand has risen by roughly 400% of GDP against a cumulative asset supply increase of about 100% of GDP, with demand winning the race and interest rates falling.
From 1950 to the present, rapid population aging, rising income inequality, increasing foreign demand for U.S. assets, and declining productivity growth all contributed to a surge in asset demand. Asset supply initially fell, then turned around sharply, mainly driven by increases in government debt and the value of capitalized profits. Overall, asset demand won the race, and interest rates fell. In the left panel, we see that asset supply and demand shifts, shown as shares of GDP, remain small until the late 1960s; then, asset supply declines through the early 1980s. Since then, both have risen dramatically, though asset demand has outpaced supply, rising by ~ 400% of GDP relative to a cumulative asset supply increase of only around 100% of GDP. [The 2nd and 3rd panels] use our recovered supply and demand shifts to decompose equilibrium movements in r∗ and A/Y. Falling asset supply is mostly responsible for the reductions in r∗ and A/Y early on. [Since] the 1980s, rising asset demand has been the leading contributor to the decline in interest rates and the rise in A/Y. Looking ahead, debt sustainability requires a fiscal consolidation of >10% of GDP, but debt could reach 250% of GDP without pushing up interest rates.



