We find robust portfolio rules for ambiguity-aversive fund managers in a financial market with transaction costs. The model proposed in this paper permit liquidity premium much bigger than those found by most empirical literature. Using reasonably-calibrated parameters, we find liquidity premium obtained from the model is much bigger, so transaction costs can have a significant effect on investors’ optimal investment behaviors. We also show that a high ambiguity aversion could be an explanation for a puzzling feature during economic crises that liquidity was greatly reduced in the financial market. Our model shows that a fund manager with a higher ambiguity aversion requires much bigger liquidity premium at times of down markets than at times of up markets.
목차
Abstract 1 Introduction 2 The Basic Model 2.1 The Financial Market 2.2 The Robust Portfolio Problem without Transaction Costs 2.3 The Robust Portfolio Problem with Transaction Costs 3 Analytical Comparative Statics 4 Implications 4.1 Baseline Parameters 4.2 Optimal Trading Strategies 4.3 Liquidity Premium 4.4 Liquidity Crash in the Global Crisis and Ambiguity Aversion 5 Conclusion 6 Appendix References
저자
Bong-Gyu Jang [ Department of Industrial and Management Engineering, POSTECH, Republic of Korea, ]
Seungkyu Lee [ Department of Industrial and Management Engineering, POSTECH, Republic of Korea, ]
Seyoung Park [ Department of Industrial and Management Engineering, POSTECH, Republic of Korea, ]