The authors thank Sam Adams, Bharat Patil, Tim Dong, and Banks Osborne for valuable research support. The authors are grateful to George Aragon, Robert Battalio, Utpal Bhattacharya, Slava Fos, Alex Kurov, Andrea Rossi, and Kumar Venkataraman as well as seminar participants at the Chinese University of Hong Kong, Cubist Systematic Strategies, Hong Kong University of Science and Technology, National University of Singapore, Singapore Management University, West Virginia University, the Financial Management Association Conference, the Northeastern University Finance Conference, and the University of Missouri for their comments.