Electronic call auctions are used globally to open and close equity market trading; as such, they are a critically important facility that needs to be better understood. The paper focuses on the impact NASDAQ's calls (introduced in 2004) have had on bid-ask spreads, price volatility, and order...

Order revelation is a non-trivial process that depends on a market's rules of order handling and order information disclosure. As participants reveal their orders for a stock to a market, the book gets deeper, price is discovered, and trading volume (quantity) is “found.” However, for large...