We gratefully acknowledge the research collaboration between MSCI Inc. and MIT Laboratory for Financial Engineering. We benefited from the methodology of MSCI Peer Similarity Scores product and the data and computing support from the MSCI Data Science Platform. We thank Roman Kouzmenko and Manuel Rueda for insightful discussions. The views and opinions expressed in this article are those of the authors only, and do not necessarily represent the views and opinions of any institution or agency, any of their affiliates or employees, or any of the individuals acknowledged above.