The authors study a simple model of an asset market with informed and non-informed agents. In the absence of non-informed agents, the market becomes information efficient when the number of traders with different private information is large enough. Upon introducing non-informed agents, the...

Two-phase phenomenon in financial markets can be described as a herding model. In our research, linear property products, 713 stocks and KOSPI 200 futures, show an out-of-equilibrium phase. Non-linear property financial instruments, KOSPI 200 option, however, have different characteristics...

Post-earnings announcement drift is stronger in firms that release earnings on days when market returns are higher in magnitude. This drift remains robust after controlling for previously documented factors such as Friday releases, the number of simultaneous releases, and price delay measure....