A history of interest rates at some banks

Personal Capital Cash

1. 1.05% (2020-03-04)
2. 0.05% (2020-03-17)

Credit Karma Savings

1. 1.30% (2020-03-05)
2. 0.56% (2020-03-18)
3. 0.52% (2020-06-18)
4. 0.44% (2020-09-01)
5. 0.40% (2020-10-01)
6. 0.30% (2021-01-01)
7. 0.27% (2021-03-01)
8. 0.20% (2021-04-01)
9. 0.17% (2021-05-01)
10. 0.13% (2021-08-01)

Simple

1. 2.02%
2. 1.75% (2019-12-17)
3. 1.55% (2020-04-02)
4. 1.40% (2020-05-05)
5. 1.20% (2020-06-02)
6. 1.00% (2020-07-01)
7. 0.80% (2020-08-25)
8. 0.60% (2020-10-08)
9. 0.50% (2020-12-10)
10. 0.40% (2021-01-26)
11. Account closed (2021-04-20)

Ally

1. 1.60% (2019-12-20)
2. 1.50% (2020-03-13)
3. 1.25% (2020-05-11)
4. 1.10% (2020-06-12)
5. 1.00% (2020-07-08)
6. 0.80% (2020-08-14)
7. 0.60% (2020-09-25)
8. 0.50% (2020-12-10)