I could not post this in rate updates as there is no Vanguard bank, but Vanguard the Investement company has a new product called Vanguard Cash Plus Account that is now offering 3.90% and is FDIC insured.
When you are enrolled in the Vanguard Cash Plus program, Eligible Balances that are swept to Program Banks are not securities: They are not covered by the Securities Investor Protection Corporation (SIPC) but are eligible for insurance by the Federal Deposit Insurance Corporation (FDIC). For more information, go to the Bank Sweep Terms of Use.