This paper rationalizes the LASSO algorithm based on uncertain fat-tail priors and max-min robust optimization. Our rationalization excludes heuristic learning or restrictive prior assumptions in the original interpretation of LASSO (Tibshirani (1996)). In our setting, economic agents...

This paper analyzes the performance of index-based portfolios across developed, emerging, and frontier markets. Besides considering stocks and bonds for portfolio construction, we investigate how investment opportunity sets are enlarged when credit default swaps (CDSs) are added into portfolios...

This paper proposes that besides volatility, R&D can increase firms' distress risk through another channel. Unlike capital investment, R&D is more inflexible and subject to high adjustment costs. Moreover, R&D intensive firms face severe financial constraints and are more likely to...

This paper investigates tactical investment strategies for investors to survive financial crises. Compared with the buy-and-hold strategy, the buy-and-sell strategy is much more effective in mitigating downside risk before, during, and after a crisis by restricting the left-tail volatility of...