# nasdaq-trade-halts

https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts (RSS 2.0 with ndaq: extension elements).

• Type: RSS · Rights: PUBLIC_ATTRIBUTED · Real-time: REALTIME (feed TTL 1 min; polled every 60 s while Nasdaq is trading, 10 min closed, hourly weekends)
• Output: TRADING_HALT (severity by reason: MWC* CRITICAL, LULD/T5 NOTICE, others WARNING) and TRADING_RESUME events, deduplicated on symbol + halt date/time.
• Timestamps: HaltDate (MM/DD/YYYY) + HaltTime (HH:MM:SS.mmm) in US/Eastern → UTC.
• Reason codes: mapped in REASON_CODES (T1 news pending, LUDP volatility pause, H10 SEC suspension…).