CD Rates available to every day consumers:
30-day : 0.05%
1YR : 0.67%
3YR: 0.85%
But with greater than $1B in federal stimulus and a likely revenue fee sharing venture already established with the US Bank ReliaCard, CDLE may have better options available from US Bank.
$1,000,000,000 x 1.0005 equals a $500,000 gain. But often there are incentives on bigger amounts such as 0.20% APY with a minimum of $20,000 deposit. Plug $1B into a 0.20% APY and that is a $2,000,000 gain in just one month or $4,004,000 for two.
CDs are just entry level financial instruments by the way. There are many other types of investments to be made with that size of money that are somewhat risk averse.