We assess the quality of opening and closing prices for Nasdaq stocks by examining the effect that opening and closing call auctions (introduced in 2004) have had on price formation. Our use of measurement intervals of one minute or less sharpens the picture of intra-day volatility...

We present resiliency as a measure of liquidity, and assess its relationship to expected returns. We establish a covariance-based measure, RES, that captures opening period resiliency and, using it, find a significant non-resiliency premium that ranges from 33 to 57 basis points per month. The...