MPA Stability Fee

[abitmore]

User Story

As a MPA owner I'd like to be able to set a stability fee on my MPA so that the business is more sustainable. The fee works like an interest for borrowing the debt asset.

Key features:

• debt position holders pay a percentage fee periodically, automatically
• if a debt position's collateral ratio (CR) is too low after paying the fee, it will get margin called
  • in extreme circumstances it may cause a black swan event
• fee rate is adjustable by asset owners if certain issuer permission / flag is set

Optional features (perhaps add later):

• distribute a percentage of the stability fee to debt asset holders

Impacts
Describe which portion(s) of BitShares Core may be impacted by your request. Please tick at least one box.

• API (the application programming interface)
• Build (the build process or something prior to compiled code)
• CLI (the command line wallet)
• Deployment (the deployment process after building such as Docker, Travis, etc.)
• DEX (the Decentralized EXchange, market engine, etc.)
• P2P (the peer-to-peer network for transaction/block propagation)
• Performance (system or user efficiency, etc.)
• Protocol (the blockchain logic, consensus, validation, etc.)
• Security (the security of system or user data, etc.)
• UX (the User Experience)
• Other (please add below)

CORE TEAM TASK LIST

• Evaluate / Prioritize Feature Request
• Refine User Stories / Requirements
• Define Test Cases
• Design / Develop Solution
• Perform QA/Testing
• Update Documentation

[shulthz]

I don't think this

debt position holders pay a percentage fee periodically automatically

is suitable,

but it can be designed to charge a interest fee when the debt position holders close any part of his position like DAI and leveraged market.