求下面这篇论文。
https://jpm.pm-research.com/content/46/7/13.abstract
Downside Volatility-Managed PortfoliosXiao Qiao, Sibo Yan and Binbin Deng
[size=0.86em]The Journal of Portfolio Management July 2020, 46 (7) 13-29; DOI: https://doi.org/10.3905/jpm.2020.1.162