(Not from the US)
Why is it a good thing to lend for free to the US gov ? Because the regional banks aren’t that stable ?
Where N is some value between like .... 30 and 90? I forget.
But they only pay that if they don’t return it that year (for normal W-2 employees).
Last time I looked, you needed to be in a higher tax bracket than I was to make Muni bonds worth it, in part because my state (WA) does not have income tax. Something like the 35% bracket.
And anyway, my investment strategy is not long bonds at this point in my life.