## Know the Stock Exchange Hours at B3 in 2024

Investors who want to know what time the stock exchange opens should pay attention to the schedule changes that affect B3 in 2024. The Brazil Stock Exchange operates according to a specific calendar, with trading periods that vary depending on the influence of the US daylight saving time and Brazilian national holidays.

## What Time Does the Stock Exchange Open and Operate?

B3 operates continuously from Monday to Friday during Brazilian business hours. Since the 2017 reform, when the São Paulo Stock, Commodities, and Futures Exchange merged with the Central Depository and Clearinghouse for Securities, the system allows trading of stocks and securities from over 400 Brazilian companies in a standardized schedule.

B3's trading session runs from 10:00 to 17:00, Brasília time, on business days. However, the market offers additional periods for operations:

**Pre-market opening**: Occurs 15 minutes before the official trading begins, between 9:45 and 10:00. During this period, the exchange records buy and sell orders issued after the previous trading session closed.

**After market**: Known as the post-market period, operates between 17:30 and 18:00, where certain assets can be traded with some operational restrictions established by B3.

## Changes in Closing Hours in 2024

From November 6, 2023, to March 10, 2024, the stock exchange closed at 18:00 due to US daylight saving time. This synchronization occurs because foreign investors need to align their operations with the American market.

Starting March 11, 2024, the schedule returns to the previous standard: closing at 17:00 and resuming the after market from 17:30 to 18:00. This change coincides with the end of US daylight saving time on March 10, 2024.

## National Holidays Affecting the Stock Market in 2024

B3 remains closed during major Brazilian holidays. Check the calendar:

**January**: 01 (Monday) - New Year's Day

**February**: 12 and 13 (Monday and Tuesday) - Carnival. On Ash Wednesday (February 14), there will be continuous trading from 13:00 to 17:55, with pre-opening at 12:45.

**March**: 29 (Friday) - Good Friday

**May**: 01 (Wednesday) - Labor Day; 30 (Thursday) - Corpus Christi

**November**: 15 (Friday) - Proclamation of the Republic

**December**: 25 (Wednesday) - Christmas; 31 (Tuesday) - New Year's Eve

International holidays do not influence the B3 calendar, except when they coincide with Brazilian commemorative dates. The market continues to operate normally on holidays in other countries.

## Why Do B3 Schedules Change?

The interconnection between the Brazilian and American stock exchanges reflects the globalized nature of modern financial markets. Changes occur in response to fluctuations in exchange rates, commodity prices such as oil and metals, and the significant presence of global funds operating simultaneously in both markets.

Maintaining synchronization of schedules ensures that Brazilian investors do not miss trading opportunities and guarantees the confidence of international investors in the Brazilian market. Therefore, keeping track of schedule updates is essential for those who want to invest in the stock exchange safely and efficiently.