US bonds are often considered risk-free. Although they also carry risk, the US is the most indebted country in the world. Other countries have a country risk premium, which is the difference in interest rates they pay compared to the US.
I would argue US bonds are used as the risk free rate for lack of a better metric.
In theory you could adjust US bonds for the level of default risk but that adjustment itself would be very subjective.
People have tried to come up with better metrics like "swap rates" but they all fall short IMO.
A risk free rate is not real but neither are the models that use risk free rates. These things are only us trying to apply logic to reality which is often not logical.
In Argentina, the only thing that can be considered risk-free is investing in stock market guarantees. They've always paid out, even during times of economic collapse.
And those rates tend to fluctuate wildly.
Do you have a link I can reference for this? I would like to review it please.
Thanks either way!