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...

This paper analyzes the impact of both penal law and prosecution of insider trading on the informational efficiency of securities markets. We show that increasing the severity of penalties to insider trading as well as making insider prosecution more efficient might improve the price discovery...

We formulate a measure of information efficiency in a general, no-arbitrage semimartingale model of the price process. The market quality measure is applied to a high-frequency dataset from the interdealer FX market to identify changes in market efficiency after a decimalization of tick size.

Even when participants know very little about their environment, the market, itself, by serving as a selection process of information, promotes an efficient aggregate outcome. To emphasize the role of the market and the importance of natural selection, rather than the strategic actions of...

We model financial innovations such as Exchange-Traded Funds, smart beta products, and many index-based vehicles as composite securities that facilitate trading common factors in assets' liquidation values. Through accessing a larger basket of assets in endogenously-chosen proportions, composite...

BitMEX is the largest unregulated bitcoin derivatives exchange, listing contracts suitable for leverage trading and hedging. Using minute-by-minute data, we examine its price discovery and hedging effectiveness. We find that BitMEX derivatives lead prices on major bitcoin spot exchanges. Bid-ask...

In this paper we examine the relation between managerial discretion in accruals and informational efficiency. We measure managerial discretion in accruals by the absolute value of discretionary accruals. Assuming that efficient prices follow a random walk, we measure informational efficiency by...

We derive an equilibrium price that converges to be strong-form informationally efficient in the original Grossman-Stiglitz model (1980). Specifically, we show that when the private signal converges to be perfect or traders converge to be risk neutral, there exists a unique overall equilibrium...

In an informational efficient market, it is the a priori expectation that trading activities should possess a directorial relationship (Barron Karpoff, 2004). Positive information which promises a better performance should ordinarily affect trading volume positively and vice versa. However, that...