Understand the New Operation of the B3 Stock Exchange in 2024

B3, the largest stock exchange in Brazil, opens today and operates according to a specific calendar that changed in 2024. For those investing in the Brazilian market, it is essential to understand when the stock exchange opens, closes, and on which dates it does not operate. This information ensures you do not miss deadlines and trading opportunities.

How the Stock Exchange Opens: Trading Hours and Sessions

Since its restructuring in 2017 — when the former Bovespa merged with CETIP to form B3 — the stock exchange has followed a consolidated operational pattern. It operates from Monday to Friday, during business days, in Brazilian business hours.

Main Trading Hours

On normal days, the stock exchange opens at 10h (Brasilia time) and closes at 17h. Between 10h and 17h, securities, stocks, and derivatives of over 400 registered companies are traded.

Additional Trading Periods

Trading is not limited to the main session. There are three distinct periods:

• Pre-opening: Starts 15 minutes before the official trading session, between 9h45 and 10h, when the stock exchange records orders issued after the previous close.

• After market: After the close at 17h, the system remains open for trading certain assets between 17h30 and 18h, subject to specific regulatory limitations.

• Extended hours: Between November and March, due to American daylight saving time, operations extend until 18h in the afternoon.

Changes in 2024: What Changed in Operating Hours

Starting March 11, 2024, the hours were modified. During the previous period (from November 6, 2023, to March 10, 2024), the stock exchange operated with a closing time at 18h. This extension was directly influenced by American daylight saving time, which synchronizes operations across markets.

With the end of American daylight saving time on March 10, the stock exchange returned to standard hours: closing at 17h and resuming after market from 17h30 to 18h. This synchronization is crucial because the American and Brazilian markets maintain intense interconnection, driven by global fund investors, exchange rate fluctuations, and commodity price changes.

National Holidays Affecting B3 Operations in 2024

On specific Brazilian holidays, the stock exchange remains closed. The 2024 calendar includes:

*Special note on Carnival: On Ash Wednesday (February 14), the stock exchange opens partially. The stock market operates from 13h to 17h55, with pre-opening from 12h45 to 13h. Derivatives and commodities open at 13h (pre-opening 12h55 to 13h). Over-the-counter markets operate from 13h to 17h55.

**On the last day of the year (December 31), B3 does not open due to internal procedures at banking institutions.

International holidays do not affect the normal operation of the stock exchange unless they coincide with Brazilian dates.

The Impact of Changes on Investments

Synchronizing the stock exchange hours with global markets reflects the interconnected nature of the modern financial system. Foreign investors constitute a significant portion of B3 operations, and changes in exchange rates, oil prices, and metals directly influence the performance of traded assets.

Understanding when the stock exchange opens and operates is crucial to avoid losses from expired deadlines and to seize windows of opportunity. Keeping track of the official calendar ensures your investments are executed at the right time, safely and in accordance with B3 rules.

Stay informed about operational changes of the stock exchange by consulting official channels. This way, you will be prepared to make effective investment decisions in the Brazilian market.