I've never bought treasuries before, but looking at the current situation, aren't they a better offering for high-income earners when you factor in state taxes?
For example:
37.00% Fed + 5.75% State (VA), a 3.6% yield treasury bill (4wk), would be equivalent to a 4% HYSA, which AFAIK 4% isnt available for larger sums of money. So after factoring in taxes, the shortest term treasuries make more sense than HYSA's. There obviously is the 4wk lock in, unless you sell on the secondary market, but im willing to live with that.
Am I missing anything? Because if this is right i'll just go sign up for Fidelity and buy 4wk treasuries.