# September 2025

## [September 26, 2025] New API for a sub-account initiates a transfer to the master account

Interface：/api/v3/account/sub-master-transfer<br/>
Changes：

- New API for a sub-account initiates a transfer to the master account


## [September 25, 2025] Candlestick and Historical Candlestick APIs Add Premium Index; Get Trading Product Information API Adds RWA Identifier Field

Interface: /api/v3/market/candles、/api/v3/market/history-candles、/api/v3/market/instruments<br/>
Changes：

- The K-Line Data and Historical K-Line Data APIs now include the Premium Index.
- The Get Trading Product Information API now includes the RWA identifier field.


## [September 23, 2025] Launch of WebSocket Order Modification and Batch Order Modification Channels

WebSocket: Order Modification, Batch Order Modification Channels <br/>
Changes： Newly added WebSocket Order Modification Channel and WebSocket Batch Order Modification Channel


## [September 2, 2025] Add reason field for Get Switch Status

Interface: /api/v3/account/switch-status<br/>
Changes：

- Add reason field for Get Switch Status