If you have a Brex Cash account, you get to decide how you want to store your money. You can put a percentage of it into a Brex program bank, which is FDIC-insured for up to $250,000, and a percentage into a money market account, which is SIPC-insured for up to $500,000. Storing money with a Brex program bank won’t earn interest while putting funds into a money market account could earn interest. However, money market accounts might also have certain expenses and fees attached to them.