> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mobula.io/llms.txt
> Use this file to discover all available pages before exploring further.

# ✨ February 21, 2026 - USD Fee Calculations in Swap Streams

> Trade and swap stream messages now include computed USD fee amounts

**TL;DR**: Swap streams now include USD-denominated fee calculations on every trade and swap message.

***

## USD Fee Calculations in Swap Streams

Trade and swap stream messages now include computed USD fees:

* Every swap message carries a `feeUsd` value
* Enables displaying fee impact directly in trading UIs without additional calculations
* Available on both `StreamTradesService` and `FastTradeStreamService` subscriptions

***

*Shipped by the Mobula team*