Structure
| Tag | Field Name | Req'd | Comments | |
|---|---|---|---|---|
| Component Block - <StandardHeader> | Y | MsgType <35> = CO | ||
| Component Block - <ApplicationSequenceControl> | N | |||
| 324 | SecurityStatusReqID | N | 
                 Required when mass status is in response to a SecurityMassStatusRequest <CN> message.  | 
        
    |
| 1465 | SecurityListID | N | 
                 Identifies all securities for a security list identifier.  | 
        
    |
| 1301 | MarketID | N | 
                 Identifies all securities for a market.  | 
        
    |
| 1300 | MarketSegmentID | N | 
                 Identifies all securities for a market segment.  | 
        
    |
| 75 | TradeDate | N | 
                 Business day that the state change applies to.  | 
        
    |
| 336 | TradingSessionID | N | 
                 Identifies all securities for a trading session.  | 
        
    |
| 625 | TradingSessionSubID | N | 
                 Identifies all securities for a trading sub-session.  | 
        
    |
| Component Block - <InstrumentScope> | N | |||
| 325 | UnsolicitedIndicator | N | 
                 Set to "Y" if message is sent as a result of a subscription request not a snapshot request.  | 
        
    |
| 1679 | SecurityMassTradingStatus | N | ||
| 2447 | FastMarketIndicator | N | ||
| 1680 | SecurityMassTradingEvent | N | ||
| 1681 | MassHaltReason | N | ||
| 1021 | MDBookType | N | 
                 Used to relay changes in the book type.  | 
        
    |
| 264 | MarketDepth | N | 
                 Used to relay changes in Market Depth.  | 
        
    |
| 60 | TransactTime | N | 
                 Time of state change for security list.  | 
        
    |
| 334 | Adjustment | N | ||
| Component Block - <SecMassStatGrp> | N | |||
| Component Block - <StandardTrailer> | Y | |||