"What’s Happening in the Missing Middle? Lessons from Financing SMEs" is an initial effort to share experiences, analyze failures and learn from practices. These SME Finance Quick Lessons were initially developed for an internal World Bank Group audience (and, in particular, the members of the SME Finance Community of Practice), the intent with this compendium is to open that dialogue to an external audience. It is hoped that reactions to these lessons, information about your SMEs’ own experiences and a wider dialogue on the issues that are faced around these topics will enrich all of the work and ensure more sustainable solutions for SME development across the globe.