Warning signs for when people stop trusting the US govt with debt would be when the interest rate starts climbing significantly beyond inflation. https://fred.

Warning signs for when people stop trusting the US govt with debt would be when the interest rate starts climbing significantly beyond inflation. https://fred.stlouisfed.org/series/DFII5 https://fred.stlouisfed.org/series/DFII5 It looks like it's trending up recently, but still well below 1% adjusted for inflation.