This study investigates changes in the call option market microstructure, as reflected in bid/ask spread changes, surrounding information release dates. The size of bid/ask spreads is not significantly changed by accounting earnings releases. The results indicate a significant increase in the bid/ask spread on the date of large price changes and a significantly increased number of insignificant changes in both actual and proportional bid/ask spreads surrounding earnings announcements and dates of large price changes. Significant increases in trading volume precede both types of information releases. Résumé. Cette étude examine les changements dans la microstructure du marché des options d'achat, tels que reflétés par les changements dans l'écart des cours acheteur et vendeur, autour des dates de publication d'information. La taille des écarts des cours acheteur et vendeur n'est pas sensiblement modifiée par la publication des bénéfices comptables. Les résultats montrent un accroissement significatif de l'écart entre le cours acheteur et vendeur à la date de changements majeurs des prix, et un accroissement significatif du nombre de changements négligeables à la fois des écarts de cours acheteur et vendeur absolus et relatifs, autour des dates de publication de résultats et de fluctuations de prix importantes. Des accroissements significatifs du niveau d'activité précèdent les deux types d'informations divulguées.

This research empirically investigates the relation between common stock and call option trading volumes. The paper hyothesizes and tests a sequential flow of information between the stock and option markets. If information trading for CBOE-listed firms is predominantly accomplished through option trading, then existing research methodologies may be biased against finding any significant economic consequences in those instances where option listing is an important variable. Results indicate that trading in call options leads trading in the underlying shares, with a one-day lag.

This research empirically investigates the relation between common stock and call option trading volumes. The paper hyothesizes and tests a sequential flow of information between the stock and option markets. If information trading for CBOE‐listed firms is predominantly accomplished through option trading, then existing research methodologies may be biased against finding any significant economic consequences in those instances where option listing is an important variable. Results indicate that trading in call options leads trading in the underlying shares, with a one‐day lag.

Reviews the book "Accounting Methodology and the Work of R.J. Chambers," by M.J.R. Gaffikin.

This paper posits that stock market response to two accounting performance measures - sales growth and capital investment - is a function of firm life cycle stage. Firms are grouped into various life cycle portfolios using dividend payout, sales growth, and age. As predicted, the empirical results indicate a monotonic decline in the response coefficients of unexpected sales growth and unexpected capital investment from the growth to the stagnant stages. Additional analysis suggests that this relation is not driven by a firm size effect, risk differences, or measurement error in the proxies for performance measures.