I can see using a lower withdrawal rate (approximating the yield on 10-year treasury bonds) if one is investing mostly in bonds. But two caveats: (1) Adding st

I can see using a lower withdrawal rate (approximating the yield on 10-year treasury bonds) if one is investing mostly in bonds. But two caveats: (1) Adding stocks to one's portfolio makes it easier to succeed with a 4% withdrawal rate in very low interest-rate environments: https://thepoorswiss.com/updated-trinity-study/ https://thepoorswiss.com/updated-trinity-study/ (2) Life expectancy. People who retire at a young age, should use a lower withdrawal rate. But a person age 75, expecting to die before age 100, could have a withdrawal rate of roughly 4% (reciprocal of 100-75) in a zero-interest-rate environment.