Exchange-traded funds (ETFs) represent one of the most important financial innovations in decades. An ETF is an investment vehicle that trades intraday and seeks to replicate the performance of a specific index. In recent years ETFs have grown substantially in assets, diversity, and market...

Exchange seat prices are widely reported and followed as measures of market sentiment. This paper analyzes the information content of NYSE seat prices using: (1) annual seat prices from 1869 to 1998, and (2) the complete record of trades, bids and offers for the seat market from 1973 to 1994....

This article develops a game-theoretic model to analyze marketmakers' intertemporal pricing strategies. The authors show that dealers who adopt noncooperative pricing strategies may set bid-ask spreads above competitive levels. This form of 'implicit collusion' differs from explicit collusion,...