> For the complete documentation index, see [llms.txt](https://duet-protocol.gitbook.io/duet-protocol/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://duet-protocol.gitbook.io/duet-protocol/functions-and-user-guides/usdbduet/overview.md).

# Overview

**A $bDUET is a certificate issued by the Duet Treasury for an investor to receive principal and interest payments denominated in Duet tokens in one or several future dates.** 

The architecture design of Duet protocol allows for creation of bonds with discounted face value or bond with interest payments. Take a bond with interest payments as an example, a 6 months bond with a face value (principal) of 100 DUET tokens and interest payments of 10 DUET per month would entitle the holder to receive DUET token as follows:

<table data-header-hidden><thead><tr><th>Date</th><th data-type="number">Payments</th></tr></thead><tbody><tr><td>Month 1</td><td>10</td></tr><tr><td>Month 2</td><td>10</td></tr><tr><td>Month 3</td><td>10</td></tr><tr><td>Month 4</td><td>10</td></tr><tr><td>Month 5</td><td>10</td></tr><tr><td>Month 6</td><td>110</td></tr></tbody></table>

Whereas an investor who would have received 100 DUET tokens today, he/she can opt to be paid with 160 DUET tokens in 6 months time, which is 60% more duet tokens.

<mark style="color:purple;">Another example of a typical discounted face value Duet bond would be a $bDuet trading at 0.5 Duet token with a face value of 1 Duet token. By investing in the bond today, investors effectively lock up a annualized return of 100%.</mark>&#x20;

**Mining rewards are locked for 9 to 12 months and Duet token holders may choose to reinvest their Duet tokens for any duration they please.**