Yes you can place an order anytime in the Finvest app, even after market-hours.

The markets are open from 9:30 AM ET-4 PM ET during regular business days (Monday-Friday, except holidays). Orders placed outside these hours will be queued to process when the market opens on the next trading day.

Treasury Bills are short-term debt securities issued by the US Government. The US government will pay you a fixed interest rate + your investment at the end of the T-Bill maturity. Treasury Bills are considered to be of one of the safest assets in the world because they are backed by the full-faith of the US government.

The interest rate on Treasury bills (or T-bills) are at an all-time high since 2007. Several savings accounts will give you far lower interest.

When you buy a Treasury Bill and hold to maturity, your interest rate is locked in! Treasury Bills are backed by the full-faith of the US government.

You also don’t have to pay state or local taxes on the interest earned!

On Finvest, you can buy Treasury Bills with maturities of 1 month, 3 month, 6 month and 1 year. 

Treasury Bills are issued at a discount to par value (also called face value). At maturity, you will be paid the face value of the bill - the interest you earn is the difference between the face value and the amount you invested. The face value of T-Bills are typically $1,000.

For example, let's say you invested $950. When the T-Bill matures, you will be paid $1,000 - since you paid $950 - the interest you earned is $50.

When your Treasury Bill matures, we will return your investment + interest back to the Finvest Cash Account. It might take a few days for the money to reach your bank account 

You can sell your Treasury Bill anytime on Finvest. Treasury Bills are highly liquid securities.