Market-Based Instruments for Voluntary Corporate Reporting: Definition and Taxonomy 

This taxonomy sheds light on Market-Based Instruments (MBIs), their definition and the different types of MBIs available for voluntary corporate reporting. 

This document aims to provide baseline definitions and core concepts for practitioners across sectors. The document has been prepared in the context of the MBI Program, to support a shared and consistent understanding of key terms and approaches. 

Types of MBIs explored include: 

- Commodity certificates 

- Mitigation-related contracts 

- Carbon credits 

- Hybrid MBIs, such as Impact Units