How do you invest in bonds and treasury notes, and can you lock-in specific interest yields or is it variabld for the duration?

Question

Title edit: *Variable.

In: 8

Answer 1

https://treasurydirect.gov/

They have a lot of different offers. The simplest to get started is probably the 4-week treasury bill. The rate is set at an auction and is fixed for the duration. You buy the t-bill and four weeks later you receive the interest.