Big businesses use current accounts for day-to-day operations. For savings, they have access to a variety of securities which they can liquidate overnight and m

Big businesses use current accounts for day-to-day operations. For savings, they have access to a variety of securities which they can liquidate overnight and might pay them some interest. Of course, this is not limited to big businesses. You can do the same with an IB brokerage account but I guess the added complexity is what puts people off.