In this paper, we propose an Adaptive Hyperbolic EGARCH (A-HYEGARCH) model to estimate the long memory of high frequency time series with potential structural breaks. Based on the original HYGARCH model, we use the logarithm transformation to ensure the positivity of conditional variance. The...

We provide insights into how the market processes going concern audit opinions based on the trading of some well-documented sophisticated investors—short sellers. We find that abnormal short selling increases significantly upon impending going concern disclosures. While prior literature...