Just curious about the "golden window for buying I-bonds" he mentions: what is the benefit of buying ibonds on April 30, 2022 at 7.12% gain versus buying on May 1, 2022 at 9.6% gain?
It confused me for awhile until I figured out that different people with different investment dates will have different instantaneous interest rates as a function of their date of investment.
So buying now lets you take advantage of the similarly nice previously set rate, for 6 mos, then another guaranteed (and known) nice rate for another 6 mos.