Starting in July, B3's LINE Trading will adopt a new calculation for the TMOC and TMOV metrics, which define the maximum bid and ask sizes for options orders. The change will take effect in two stages: July 21, 2025, for Equity Options, and August 25, 2025, for Derivatives Options. Details of the update can be found in the LINE 5.0 | B3 version.

In seeking to make life easier for users of B3’s trading platform, we now make a daily file available directly on B3 portal with relevant data on tradable instruments. The file consists of an exact copy of the Market Data SecurityList and contains data on the minimum size, in terms of quantity, for instruments tradeable in block trade solutions (Midpoint, BBT and RFQ). This data is updated daily per asset considering the minimum size in financial value defined by the regulator and the asset’s closing price, which until then was only disclosed on Market Data. Now queries can be made via file directly on the B3 portal, simplifying the trade for users of block trade solutions. Check the file now: https://www.b3.com.br/en_us/market-data-and-indices/data-services/market-data/historical-data/newsletters/search-by-trading-session/search-by-trading-session/

Following the implementation of the Post-Trade Solution for Fixed Income Private Securities (Flow II), in some cases, the number of allocations exceeded the limit of the current message (bvmf.234), making it impossible to send the status of the trade. In this respect, we will implement an improvement to the flow, creating a new message (b3.296), which will be paginated and will allow the institution to receive the status of all allocations made.