> For the complete documentation index, see [llms.txt](https://gbankapy.gitbook.io/usdgbankapy/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gbankapy.gitbook.io/usdgbankapy/gbank-apy/fixed-apy.md). # Fixed APY {% hint style="info" %} Annual Percentage Yield What is APY? APY stands for Annual Percentage Yield. It measures the real rate of return on your principal by taking into account the effect of compounding interest. Your $GbankAPY (GBK) tokens represents your principal, and the compound interest is added periodically on every Rebase event (Every 3 seconds). One interesting fact about APY is that your balance will grow not linearly but exponentially over time! Assuming a daily compound interest of approximately 2.54%, if you start with an initial balance of $1,000 $GBK token on day 1, after a year, your balance will grow to approximately $9,535,565 worth of $GBK token. A brief mathematical Run-down: 0.00008833498813% per block (3seconds) 0.001766699763% per minute 0.1060019858% per hour 2.544047658% per day 19.22660913% per week 112.4778594% per month 9,535,565% per year (APY) {% endhint %} --- # 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://gbankapy.gitbook.io/usdgbankapy/gbank-apy/fixed-apy.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.