For the most part, yes (sorta). They're both debt instruments with varying maturities (t-bills <=1 yr) that earn you some sort of interest income/rate of return.
Biggest difference is t-bills are backed by the US Gov (low default risk). T-Bills are zero coupon bonds, so you buy them at a discount and at maturity, you get the par value (e.g buying a t-bill at $95 with a par value of $100). And if you buy new issuances, they are state tax free. So I'm my case, a CD having a comparable rate of return and maturity to that of a t-bill is often a worse play wrt the effective rate of return. Fucking VA state taxes.
Most recent rates of return...
www.treasurydirect.gov
Bills | CMB | CUSIP | Issue Date | High Rate | Investment Rate | Price per $100 |
---|
4-week | No | 912797GH4 | 07/25/2023 | 5.255% | 5.365% | $99.591278 |
8-week | No | 912797GT8 | 07/25/2023 | 5.255% | 5.387% | $99.182556 |
13-week | No | 912797FB8 | 07/20/2023 | 5.250% | 5.409% | $98.672917 |
17-week | No | 912797HL4 | 07/25/2023 | 5.270% | 5.453% | $98.257972 |
26-week | No | 912797GD3 | 07/20/2023 | 5.250% | 5.483% | $97.345833 |
52-week | No | 912797GB7 | 07/13/2023 | 5.130% | 5.428% | $94.813000 |