> For the complete documentation index, see [llms.txt](https://bravenine.gitbook.io/brave-nine/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bravenine.gitbook.io/brave-nine/gameplay/about-brave-token/tokenomics/exchange-rate.md).

# Exchange Rate

### **July 14th 2022 Change**

Purified Terra will be refreshed once a week. 

However, to prevent a sudden change of the rate, there will be a set limit on how much the exchange rate can change at a time. 

**\[Exchange Rate Formula]** 

**1000 \* (1 + total amount of Purified Terra in the server / 1,000,000,000) \* \[ 1 - 0.9 x \* BVT Exchange Rate ]**

*\*Rate of BVT exchanged to Purified Terra*

![\[Exchange Rate Formula\] ](https://560184899-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fqaj4HLLwY6HL7B7YEvIt%2Fuploads%2FHSlQm1xhJId4zQdBUVU2%2F%EC%8B%A0%EA%B7%9C%20%EA%B5%90%ED%99%98%EB%B9%84.png?alt=media\&token=79ce16ba-c6e3-45f4-9097-73f1f78b7101)

* total amount of Purified Terra = Total number of owned Purified Terra by recently active Terra Server Players 
* However, each exchange rate refresh can only change the Purified Terra amount by a set amount.