In this paper, we analyze the capacity of supremum augmented Dickey–Fuller (SADF), generalized SADF (GSADF), and of several heteroscedasticity-adjusted sup-ADF-style tests for detecting and date-stamping financial bubbles. Our Monte Carlo simulations find that the majority of the sup-ADF-style...

The effects of option trading at the DTB on the variance of the underlying stocks are examined. We use a new distribution free test being based on the empirical distribution functions. The evidence indicates that stock return variance increased after the introduction of the DTB. This effect can...