RT Journal Article SR Electronic T1 Active Portfolio Management with Conditioning Information JF The Journal of Investing FD Institutional Investor Journals SP joi.2019.1.077 DO 10.3905/joi.2019.1.077 A1 Ieda, Masashi A1 Fujino, Naoki A1 Sasaki, Hiroshi YR 2019 UL http://joi.pm-research.com/content/early/2019/03/01/joi.2019.1.077.abstract AB In this article, the authors propose an efficient and practical portfolio management methodology in which portfolio weights are determined by several market observations. Their method is based on the managed portfolio construction technique, which makes it tractable for fund managers. The key points of this work are as follows: (i) to impose constraints on active weights against the prespecified benchmark weights, and (ii) to show empirically that the constraints stabilize and improve portfolio performance by conducting backtests.