NOII Snapshot
GET/openapi/market-data/stock/noii/snapshot
• Function description: Provides the latest NOII (Net Order Imbalance) snapshot data during US stock auction phases (opening/closing), used to determine real-time market supply-demand relationship and expected match price.
• NOII data is only published during specific auction periods and updates every 5 seconds:
- Opening auction: ET 9:28 - 9:30 (2 minutes only)
- Closing auction: ET 15:50 - 16:00 (10 minutes)
- Outside these periods, historical data is returned.
• Frequency limit: Market-data interfaces rate limit is 600 requests per minute.
Request
Responses
- 200
- 401
- 417
- 500
OK
Unauthorized: Authentication required
A business logic error triggered when the request cannot be processed due to domain-specific constraints.
Internal Server Error.