“…Finally, our paper connects to the recent vintage of papers that revisits the question of how to combine characteristics into tradable portfolios (see Gu, Kelly, and Xiu, 2018;Huang, Li, and Zhou, 2018;Freyberger, Neuhierl, and Weber, 2018;Kozak, Nagel, and Santosh, 2019;Liu, Tsyvinski, and Wu, 2019). These papers all take as their starting point a set of characteristics that explain average excess returns.…”