ASX frequently forwards notices to market participants covering a wide range of topics including margin intervals, market maker obligations and new option stocks. Refer to the general notices section for a full list.
If an options stock makes a pro-rata change to its ordinary share capital structure, ASX may make an adjustment to the options listed over that stock. This is done to preserve the value of open positions held by takers and writers before and after the change. Refer to the corporate actions section for more details.