After TDameritrade merged with Charles Schwab, I now have 2 brokerage accounts with Charles totaling 1.8M. I am thinking of merging into one to simply accounts. I am not sure about any risks for doing that. According to Charles Schwab link below, they are FDIC insured for $250,000. But is it per account, or per bank?
https://www.schwab.com/legal/account-protection
https://www.schwab.com/legal/account-protection