If you have $500K in savings, and move half to a money market account elsewhere, you go from 50% to 100% FDIC insured.
Also, there are sweep accounts that automate this. You can use that technique to easily get $3M of FDIC insurance from a single account. They typically yield high amounts of interest, so I assume they are backed by money market accounts.
Also, there are sweep accounts that automate this. You can use that technique to easily get $3M of FDIC insurance from a single account. They typically yield high amounts of interest, so I assume they are backed by money market accounts.