Trading Window Closure

A trading window closure is a notice that a company's designated persons — directors, key employees and their relatives — may not trade the company's shares for a period, usually from the end of a quarter until 48 hours after the quarter's results are published.

It comes from SEBI's Prohibition of Insider Trading (PIT) Regulations, 2015. Insiders are presumed to know unpublished price-sensitive information before the market does, so companies close the window whenever such information exists — most routinely around results, and also around events like a merger or a large fundraise.

The filing is almost always routine. On 25 June 2026, for instance, Bharti Airtel told the exchanges its trading window would be closed from 1 July 2026 until 48 hours after it declared results for the quarter ended 30 June 2026.

Because every listed company files these each quarter, they are among the most common announcements on NSE and BSE. They are useful mainly as a calendar hint: a closure notice tells you a results cycle has begun.

How stocks tend to react

Routine closures around results do not move prices. An unscheduled closure outside the results cycle can be worth noticing, because it implies the company holds some other price-sensitive information that has not yet been announced.

MarketPing measures this instead of guessing: every analysed announcement carries the stock's actual price reaction across 14 horizons, and the Reaction Lab aggregates how each category of announcement has historically moved stocks.

Related terms

Educational content, not investment advice. Regulations and tax rules change — verify current rules before acting.