there is https://en.wikipedia.org/wiki/Certificate_of_Deposit_Account... "The Certificate of Deposit Account Registry Service (CDARS), was a US for-profit service that broke up large deposits (from individuals, companies, nonprofits, public funds, etc.) and placed them across a network of more than 3000 banks and savings associations around the United States. This allowed depositors to deal with a single bank that participates in CDARS but avoid having funds above the Federal Deposit Insurance Corporation (FDIC) deposit insurance limits in any one bank."