Understand the Changes in the B3 Stock Exchange Schedule for 2024

Brazilian investors need to be aware of the operational changes that B3 has implemented this year. The Brazilian stock exchange has not only adjusted its trading hours according to the international calendar but also reorganized its business day schedule for 2024, reflecting the increasing synchronization among global financial markets.

The new operational standard of B3 in 2024

Since 2022, the stock exchange’s operating hours follow a consolidated pattern. Trading occurs between 10:00 and 17:00 Brasília time, Monday through Friday. However, this structure is directly influenced by the American daylight saving time, which has significant impacts on Brazilian asset trading.

The most recent change occurred on March 11, 2024. Until that date, the stock exchange closed at 18:00, corresponding to the daylight saving time in the United States (in effect since November 6, 2023). After the end of daylight saving time in the US on March 10, the closing time reverted to 17:00, also restoring the after-market trading between 17:30 and 18:00.

How B3’s trading session is structured

The stock exchange’s operating structure is divided into three distinct periods. The first is the pre-open, which occurs 15 minutes before the regular trading session. At B3, this period runs from 9:45 to 10:00, when orders issued after the previous session’s close are registered.

The regular trading session is the central period of trading, occurring from 10:00 to 17:00. During these hours, over 400 Brazilian companies have their securities and shares traded, representing the strength of the domestic market.

The after-market, or post-market period, allows trading of some assets between 17:30 and 18:00. This schedule varies according to the international calendar and operates under specific rules of the stock exchange, with limitations on permitted transactions.

Holidays that impact operations in 2024

The 2024 calendar features several days when B3 does not operate normally. In the first quarter, the stock exchange is closed on January 1 (New Year), February 12 and 13 (Carnival Monday and Tuesday), and March 29 (Good Friday).

Ash Wednesday, February 14, receives special treatment. On this day, the stock exchange operates in a continuous session from 13:00 to 17:55, with pre-opening from 12:45 to 13:00. Derivatives and commodities open at 13:00 (with pre-opening at 12:55), while the organized over-the-counter market also functions from 13:00 to 17:55.

In the second quarter, trading is affected on May 1 (Labor Day) and May 30 (Corpus Christi). In the second half of the year, only November 15 (Proclamation of the Republic) interrupts the regular operating hours. December closes with two days off: December 25 (Christmas) and December 31 (New Year’s Eve, when banking institutions are closed).

It is important to note that municipal holidays, such as São Paulo’s anniversary, do not affect the stock exchange’s operating hours, although the city hosts the physical building of B3.

The connection between global markets and the Brazilian stock exchange

Impacts from schedule changes at the stock exchange go beyond administrative issues. Synchronization with international markets reflects the integrated nature of contemporary finance. Investors in global funds, fluctuations in exchange rates, and changes in commodity prices like oil and metals directly influence B3’s operations.

Therefore, maintaining synchronization between the operating hours of the Brazilian and American stock exchanges is not just a matter of convenience. It ensures that Brazilian investors remain active in international trading and that the domestic market maintains confidence among foreign participants. The interconnection between stock exchanges represents the interdependence of modern financial markets.

Investors should regularly monitor B3’s official channels to confirm any additional changes to operating hours and ensure their transactions are executed within the correct periods, avoiding missed opportunities or transactions outside the designated timeframes.