I use SPAXX at Fidelity. It is mostly government paper, and while not explicitly FDIC insured, I am confident of it's solvency in almost all situations due to new money market regs (that should prevent the most common MMF products from "breaking the buck").
If you are incredibly conservative, you could keep enough cash for 30-90 days in an FDIC deposit account, with the rest in money market funds that will take time to resolve solvency issues.
If you are incredibly conservative, you could keep enough cash for 30-90 days in an FDIC deposit account, with the rest in money market funds that will take time to resolve solvency issues.
https://www.sec.gov/news/statement/crenshaw-statement-adopti...
https://institutional.fidelity.com/app/proxy/content?literat...
https://fundresearch.fidelity.com/mutual-funds/summary/31617...