What it means
A trading blackout is a window set by the company itself, usually running from a few weeks before the end of a reporting period until one or two trading days after the results are announced. During that window the people most likely to know how the numbers will land are told not to buy or sell the company's shares.
The reason is that securities law already prohibits trading on material information the public does not have, and the penalties fall on the individual as well as the employer. A published blackout calendar removes the guesswork, because nobody has to decide in the moment whether what they know counts as material.
Coverage is wider than most people assume. Directors and officers are always included, but so are staff in financial planning, revenue operations and investor relations, often anyone who touches the consolidation spreadsheet, and in many policies their spouses and dependants too.
The second common meaning has nothing to do with share dealing. When an employer changes pension provider or record keeper, member accounts have to be valued, transferred and reconciled, so contributions, fund switches and withdrawals are suspended for a defined period.
Regulators generally require advance written notice so members can rearrange their holdings before the freeze begins. Two refinements come up repeatedly in company policies.
Pre-clearance requires listed insiders to get written approval from a compliance officer before any trade, even in an open window, while a pre-arranged trading plan lets an insider set out dates and amounts in advance, at a time when they hold no sensitive information, so the trades execute later without a fresh decision.
In practice
Real-world examples.
Example
A listed software company closes its quarter on 30 September and reports on 5 November. Its policy opens a blackout on 16 September and lifts it two trading days after the announcement. The head of sales operations, who can see the revenue pipeline weeks before anyone outside the company, schedules a share sale for late November rather than October.
Example
A manufacturer moves its staff pension scheme to a new administrator over three weeks in July. Members are notified in May that no fund switches, loans or withdrawals will be possible between 6 July and 27 July. An employee who wants to move into a lower risk fund before retiring makes the switch in June instead of waiting.
Example
A retail group is negotiating the purchase of a rival and has not announced it. Counsel imposes an ad hoc blackout on the twenty five people who know, on top of the normal results calendar, lasting until the deal is public or dropped. The restriction explicitly covers spouses and any household member trading on the same information.
Case study
Seen in the real world.
Halverson Precision Tools is a fictional mid sized listed engineer used here purely as an illustration. Its trading policy ran to one page and named only directors. The financial controller, who was not a director, sold a block of shares eleven days before a profit warning that his own forecast had triggered.
Nothing about the sale suggested bad intent, but the timing was indefensible on paper and the story reached a trade publication within a fortnight. The board found itself explaining a policy gap rather than the trading results, which was a far worse conversation to have.
In the illustrative outcome, the board published a fixed blackout calendar covering the next two years, extended the restricted list from eight people to forty one named roles, and added pre-clearance for everyone on that list. Insider trades fell sharply in the first year, which the chair described as the policy working rather than failing. The company also began offering pre-arranged trading plans so employees could sell on a schedule set months in advance.
Watch out
Common mistakes.
- Assuming the blackout only applies to directors, when most policies cover any employee with early sight of results, along with their close family.
- Treating the end of a blackout as permission to trade, when the underlying prohibition on trading with inside information applies at all times, open window or not.
- Confusing a pension plan blackout with a trading blackout when communicating with staff, which causes needless alarm about retirement savings.
Questions
People also ask.
Can I still exercise share options during a trading blackout?
Usually you can exercise and hold, because no shares change hands in the market, but selling the resulting shares is normally blocked.
Does a blackout stop me buying shares or only selling them?
Both, because buying ahead of good news you already know about is the same offence as selling ahead of bad news.
How long does a pension plan blackout normally last?
Most run from a few days to about three weeks, and members are usually given at least thirty days of advance notice before it starts.
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