The Don’t Know Trade (DK) message notifies a trading partner that an electronically received execution has been rejected.
Added 
									    FIX.4.0
Expand Components | Collapse Components
| Field or Component | Field Name | Req'd | Comments | Depr. | 
|---|
|  | Component | StandardHeader |  | MsgType = Q | 
|  | 37 | OrderID |  | Broker Order ID as identified on problem execution | |
|  | 17 | ExecID |  | Execution ID of problem execution | |
|  | 127 | DKReason |  | ||
|  | 55 | Symbol |  | ||
|  | 65 | SymbolSfx | |||
|  | 48 | SecurityID | |||
|  | 22 | IDSource | |||
|  | 167 | SecurityType | Must be specified if a Future or Option. If a Future: Symbol, SecurityType, and MaturityMonthYear are required. If an Option: Symbol, SecurityType, MaturityMonthYear, PutOrCall, and StrikePrice are required. | ||
|  | 200 | MaturityMonthYear | Specifiesthe month and year of maturity. Required if MaturityDay is specified. | ||
|  | 205 | MaturityDay | Can be used in conjunction with MaturityMonthYear to specify a particular maturity date. | ||
|  | 201 | PutOrCall | For Options. | ||
|  | 202 | StrikePrice | For Options. | ||
|  | 206 | OptAttribute | For Options. | ||
|  | 231 | ContractMultiplier | For Fixed Income, Convertible Bonds, Derivatives, etc. Note: If used, quantities should be expressed in the "nominal" (e.g. contracts vs. shares) amount. | ||
|  | 223 | CouponRate | For Fixed Income. | ||
|  | 207 | SecurityExchange | Can be used to identify the security. | ||
|  | 106 | Issuer | |||
|  | 348 | EncodedIssuerLen | Must be set if EncodedIssuer field is specified and must immediately precede it. | ||
|  | 349 | EncodedIssuer | Encoded (non-ASCII characters) representation of the Issuer field in the encoded format specified via the MessageEncoding field. | ||
|  | 107 | SecurityDesc | |||
|  | 350 | EncodedSecurityDescLen | Must be set if EncodedSecurityDesc field is specified and must immediately precede it. | ||
|  | 351 | EncodedSecurityDesc | Encoded (non-ASCII characters) representation of the SecurityDesc field in the encoded format specified via the MessageEncoding field. | ||
|  | 54 | Side |  | ||
|  | 38 | OrderQty | Either CashOrderQty or OrderQty is required. | ||
|  | 152 | CashOrderQty | Either CashOrderQty or OrderQty is required. Specifies the approximate "monetary quantity" for the order. Broker is responsible for converting and calculating OrderQty in shares for subsequent messages. | ||
|  | 32 | LastShares | Required if specified on the ExecutionRpt | ||
|  | 31 | LastPx | Required if specified on the ExecutionRpt | ||
|  | 58 | Text | |||
|  | 354 | EncodedTextLen | Must be set if EncodedText field is specified and must immediately precede it. | ||
|  | 355 | EncodedText | Encoded (non-ASCII characters) representation of the Text field in the encoded format specified via the MessageEncoding field. | 
|  | Component | StandardTrailer |  | 
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