Abstract 1. Introduction 2. Related Literature 3. The Model 3.1 Investors' Utility Maximization Problem 3.2 Equilibrium Price and Its Properties 3.3 UDTs' Information Production Decision 3.4 Price Informativeness of the Risky Asset 3.5 Decomposition of Price Variability 3.6 A Numerical Example 4. Empirical Tests 4.1 Sample and data 4.2 Empirical results 5. Conclusion Appendix References