Insider Trading

The law on trading with inside information
A guide published by Dotto

Pane 03 · The calendar

Trading windows and blackout periods

Entities in the ASX Listing category must have a trading policy that limits when their key management personnel can trade the entity’s securities. Some policies keep trading shut except in set windows; others keep it open except in set blackout periods.

General informationThis page describes the ASX rules and the ASX’s published guidance in our own words. It is not advice about any trade. Each listed entity’s own policy governs its people, ASIC administers the insider trading laws, and a lawyer can say how they apply.

What the listing rules require

Four short rules in Chapter 12 of the ASX Listing Rules do the work.

The ASX’s guidance note says these rules do not apply to entities in its debt listing or foreign exempt listing categories, although the ASX can require such an entity to comply in a particular case.

The five things every policy must contain

  1. The entity’s closed periods.
  2. The trading restrictions that apply to its key management personnel.
  3. Any trading the policy does not cover.
  4. Any exceptional circumstances in which key management personnel may trade in a prohibited period with prior written clearance.
  5. How that prior written clearance is obtained.

Two ways to draw the closed time

A policy must have at least one fixed closed period; the ASX’s guidance says a policy without one does not comply. There are two ways to express it.

Trading windows and blackout periods compared, from ASX Guidance Note 27
ApproachWhen trading is closedWhat the ASX says about it
Trading windowsAll year, apart from the windows the policy names Often preferred, because the time open to trade tends to be shorter, which lowers the risk and makes the policy simpler to run
Blackout periodsOnly during the blackout periods the policy names Also complies with the rule; the choice is the entity’s

An example calendar

The listing rules do not say which periods must be closed; each entity chooses its own. The ASX’s guidance does say what it would generally expect. Its points, in summary:

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
  • Window open (example)
  • Closed period (example)
An example only. The company, its results dates and its meeting date are invented to show the shape of a trading-window policy; they describe no real entity. Dates are for a year that is not a leap year, so each window is exactly 4 weeks.
The example calendar, period by period (a year that is not a leap year)
Dates (example)StatusWhy, in this example
1 January to 20 FebruaryClosedThe half-year books closed on 31 December and the results are not yet out.
21 February to 20 MarchOpen windowFour weeks from the day after the half-year results, released on 20 February.
21 March to 22 AugustClosedTakes in the full-year close on 30 June, starting well before it, until the full-year results on 22 August.
23 August to 19 SeptemberOpen windowFour weeks from the day after the full-year results.
20 September to 28 OctoberClosedThe policy opens no window again until after the annual general meeting on 28 October.
29 October to 25 NovemberOpen windowFour weeks from the day after the meeting.
26 November to 31 DecemberClosedRuns into the next half-year close.

On the length of the “reasonable time”, the guidance gives two common approaches: some entities reopen trading when the market opens on the day of a release made early that morning, and others wait for the next trading day. This example takes the second, more cautious course.

Close view of grey venetian blind slats, nearly shut, with light showing at their edges
Slats nearly shut, with light at the edges. Photo by Myriams-Fotos on Pixabay

Who the policy covers

The rules require the policy to restrict key management personnel. The listing rules borrow that term from accounting standard AASB 124: the people with authority and responsibility for planning, directing and controlling the entity’s activities, which includes every director. The guidance says this will typically include the chief executive and those senior executives reporting to them who hold that authority.

The guidance also asks entities to think about going further: to the close family of key management personnel and the family companies and trusts they control, and to staff who may see sensitive material early, such as finance teams, executive assistants and IT staff with access to executives’ files.

Extra closures, exclusions and exceptions

When a director’s interests change, the notice the entity gives the ASX (Appendix 3Y) must say whether the trade happened in a closed period that needed prior written clearance, whether clearance was given, and on what date.

A window does not make a trade lawful

This is the point the ASX’s guidance returns to more than once. A trade made inside an open window, outside a blackout period, under an exclusion, or with clearance can still breach the insider trading laws if the person dealing has inside information at the time. The ASX recommends that every policy says so. The prohibition itself is in section 1043A of the Corporations Act, explained in the guide to what insider trading is.

The full rules and guidance are on the ASX’s page of listing rules, guidance notes and waivers.