Autonomous Money Supply Strategy Utilizing Control Theory

TL;DR

This paper proposes a novel control-theoretic approach to managing the money supply in DeFi systems, aiming to stabilize currency value through adaptive interest rate strategies based on Proportional-Integral-Derivative control.

Contribution

It introduces a time-weighted interest rate management method using PID control to improve stability and responsiveness in DeFi money supply systems.

Findings

Demonstrates improved stability of DeFi currency value

Shows adaptability of PID control in dynamic market conditions

Addresses limitations of existing DeFi debt management strategies

Abstract

Decentralized Finance (DeFi) has reshaped the possibilities of reserve banking in the form of the Collateralized Debt Position (CDP). Key to the safety of CDPs is the money supply architecture that enables issued debt to maintain its value. In traditional markets, and with respect to the United States Dollar system, interest rates are set by the Federal Reserve in an attempt to influence the effects of excessive inflation. DeFi enables a more transparent approach that typically relies on interest rates or other debt recovery mechanisms being directly informed by asset price. This research investigates contemporary DeFi money supply and debt management strategies and their limitations. Furthermore, this paper introduces a time-weighted approach to interest rate management that implements a Proportional-Integral-Derivative control system to constantly adapt to market activities and protect the value of issued currency, while addressing observed limitations.