This document discusses financial soundness indicators (FSIs), which are intended to provide summary measures of the soundness of financial institutions and markets. It outlines the history and development of FSIs, including their introduction following crises in the 1990s. The document describes the IMF's process for selecting core and encouraged FSIs and coordinating their compilation among member countries. It notes progress made but also issues that have arisen, such as limitations of the data. The document concludes by discussing plans to review and potentially revise the FSIs to address lessons from the recent crisis and better capture systemic risks going forward.