This paper introduces the Copula Asymmetry Index (CAI), a rolling, rank-based measure of asymmetric tail dependence between equity returns and implied-volatility proxies. CAI is defined as the difference between the empirical frequency of joint "equity-down & volatility-up" tail events and that...

This paper develops a novel hybrid framework that integrates clustering-enhanced Particle Swarm Optimization (PSO) with stretching techniques to solve Markowitz's quadratic portfolio optimization problem. The proposed approach avoids local optima traps that plague traditional optimization...

How do investors perceive and navigate the emerging geoeconomic risk? We identify firm-level geoeconomic risk using supply-chain links to Chinese firms targeted by U.S. export controls. Affected U.S. suppliers experience negative abnormal returns around policy announcements. These shocks...