Wealthfront is paying 4.05%, and if you can convince someone to open an account and use your referral, you get an extra 50 bps for 3 months, up to 4 times, for

Wealthfront is paying 4.05%, and if you can convince someone to open an account and use your referral, you get an extra 50 bps for 3 months, up to 4 times, for 12 months of 0.50% bonus. You could get 4.55% for up to 12 months with 100% liquidity, much better than a CD.