> For the complete documentation index, see [llms.txt](https://ark-defai.gitbook.io/ark/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ark-defai.gitbook.io/ark/4.-layer-1-or-economic-laws-of-ark-defai/4.2-five-regulation-modules/4.2.3-yrf-module-or-yield-revenue-feedback/ii.-mechanism-summary.md).

# II. Mechanism Summary

* Regularly allocates a specific percentage (e.g., 30%) from the protocol's actual revenue as the buyback budget
* Triggers a buyback procedure on a daily or weekly schedule, placing orders to purchase ARK
* Immediately **burns** the purchased ARK after buyback, with transparent on-chain recording
* Does not activate based on price fluctuations, but executes steadily based on revenue and governance parameters

This module forms a bidirectional cycle mechanism with EM:

* EM: Expansionary currency issuance (with Premium as the judgment basis)
* YRF: Contractionary currency destruction (with revenue and allocation ratio as conditions)