> For the complete documentation index, see [llms.txt](https://docs.tangible.store/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tangible.store/ustb/ustb-yield.md).
# USTB Yield
### US Treasury Bills Yield
U.S. Treasury bills, commonly known as T-bills, are short-term government securities issued by the U.S. Department of the Treasury.
The yield from T-bills comes from the difference between the purchase price and the face value (also known as the par value) of the bill. T-bills are typically sold at a discount to their face value; investors receive the face value upon maturity. The yield, therefore, is the gain realized over the investment period, calculated as a percentage of the initial investment.
One of the key features of T-bills is their predictable yield. Since they are issued with fixed terms (commonly 4, 8, 13, 26, or 52 weeks), the return can be calculated with a high degree of accuracy at the time of purchase. This predictability, combined with the safety of the investment, makes T-bills a favored choice for investors seeking a low-risk, short-term investment option.
T-bill liquidity – the ease with which they can be bought and sold in the financial markets – adds to their appeal. This liquidity, along with the U.S. government's creditworthiness, contributes to the general perception of T-bills as a virtually risk-free asset.
### USTB Yield
USTB holders earn the aforementioned yield accrued by the T-bills that ultimately back it.
[Mountain Protocol ](https://docs.mountainprotocol.com/)manages the USDM reserves, USDM backs USTB 1:1. As USDM accrues yield from it's T-bill backing, that yield is passed along to USDM holders as a daily rebase. USTB takes this increase to it's USDM backing and sends it to USTB holders as a daily rebase.
[Read more](/ustb/backing-asset-usdm.md#rebasing-example) about USDM rebasing and the reward multiplier.
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
GET https://docs.tangible.store/ustb/ustb-yield.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.