Okay, but that's not what he said: >An investment with risk so low to survive two millennia can safely yield 0%. If risk-free assets garnered 0% interest rate

Okay, but that's not what he said: >An investment with risk so low to survive two millennia can safely yield 0%. If risk-free assets garnered 0% interest rates, then the U.S. Treasury would not have to pay a real rate of return on its debt.