| Tag | Field Name | Req'd | Comments | 
                           
                              | Component Block - <StandardHeader> | Y | MsgType = BV | 
                           
                              | 1394 | MarketReportID | Y | Unique identifier for each Market Definition message | 
                           
                              | 1393 | MarketReqID | N |  | 
                           
                              | 1395 | MarketUpdateAction | N | Specifies the action taken | 
                           
                              | 1301 | MarketID | Y |  | 
                           
                              | 1300 | MarketSegmentID | N |  | 
                           
                              | 1396 | MarketSegmentDesc | N |  | 
                           
                              | 1397 | EncodedMktSegmDescLen | N | Must be set if EncodedMktSegmDesc field is specified and must immediately precede it. | 
                           
                              | 1398 | EncodedMktSegmDesc | N | Encoded (non-ASCII characters) representation of the MarketSegmDesc field in the encoded format specified via the MessageEncoding
                                 field. | 
                           
                              | 1325 | ParentMktSegmID | N | Specifies that the Market Segment is a sub segment of the Market Segment defined in this field. | 
                           
                              | 15 | Currency | N | The default trading currency | 
                           
                              | Component Block - <BaseTradingRules> | N | Insert here the set of "BaseTradingRules" fields defined in "common components of application messages" | 
                           
                              | Component Block - <OrdTypeRules> | N | Insert here the set of "OrdTypeRules" fields defined in "common components of application messages" | 
                           
                              | Component Block - <TimeInForceRules> | N | Insert here the set of "TimeInForceRules" fields defined in "common components of application messages" | 
                           
                              | Component Block - <ExecInstRules> | N | Insert here the set of "ExecInstRules" fields defined in "common components of application messages" | 
                           
                              | 60 | TransactTime | N |  | 
                           
                              | 58 | Text | N | Comment, instructions, or other identifying information. | 
                           
                              | 354 | EncodedTextLen | N | Must be set if EncodedText field is specified and must immediately precede it. | 
                           
                              | 355 | EncodedText | N | Encoded (non-ASCII characters) representation of the Text field in the encoded format specified via the MessageEncoding field. | 
                           
                              | Component Block - <ApplicationSequenceControl> | N |  | 
                           
                              | Component Block - <StandardTrailer> | Y |  |