spb/market-atlas

1# nasdaq-trade-halts23`https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts` (RSS 2.0 with `ndaq:` extension elements).45- **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)6- **Output**: `TRADING_HALT` (severity by reason: MWC* CRITICAL, LULD/T5 NOTICE, others WARNING) and `TRADING_RESUME` events, deduplicated on symbol + halt date/time.7- **Timestamps**: `HaltDate` (MM/DD/YYYY) + `HaltTime` (HH:MM:SS.mmm) in US/Eastern → UTC.8- **Reason codes**: mapped in `REASON_CODES` (T1 news pending, LUDP volatility pause, H10 SEC suspension…).9