---
title: "FIX 5.0 SP2 EP299: IOI <6> message – FIX Dictionary – Onix Solutions"
description: "<meta name=\"description\" content=\"IOI&lt;6&gt; message &ndash; FIX 5.0 SP2 EP299, FIX protocol version FIX 5.0 SP2 EP299\" /> <meta name=\"keywords\" content=\"message, IOI, MsgType=6, FIX 5.0 SP2 EP299, FIX Protocol, FIX dictionary\" />"
---

<https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/msgtype_6_6.html#>

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# IOI <6> message

## FIX 5.0 SP2 EP299

### Description

 Indication of interest messages are used to market merchandise which the broker is buying or selling in either a proprietary or agency capacity. The indications can be time bound with a specific expiration value. Indications are distributed with the understanding that other firms may react to the message first and that the merchandise may no longer be available due to prior trade.

 Indication messages can be transmitted in various transaction types; NEW, CANCEL, and REPLACE. All message types other than NEW modify the state of the message identified in [IOIRefID <26>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_26.html).

### Structure

| Tag | Field Name | Req'd | Comments |
| --- | --- | --- | --- |
| [Component Block - <StandardHeader>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_StandardHeader.html) | Y | [MsgType <35>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_35.html) = 6 |  |
| [Component Block - <ApplicationSequenceControl>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_ApplicationSequenceControl.html) | N |  |  |
| 23 | [IOIID](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_23.html) | Y |  |
| 28 | [IOITransType](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_28.html) | Y |  |
| 26 | [IOIRefID](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_26.html) | N | Required for Cancel and Replace [IOITransType <28>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_28.html) messages |
| [Component Block - <Instrument>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_Instrument.html) | Y | Insert here the set of [<Instrument>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_Instrument.html) (symbology) fields |  |
| [Component Block - <InstrumentExtension>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_InstrumentExtension.html) | N |  |  |
| [Component Block - <Parties>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_Parties.html) | N | Insert here the set of [<Parties>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_Parties.html) (firm identification) fields |  |
| [Component Block - <FinancingDetails>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_FinancingDetails.html) | N | Insert here the set of [<FinancingDetails>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_FinancingDetails.html) fields |  |
| [Component Block - <UndInstrmtGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_UndInstrmtGrp.html) | N | Number of underlyings |  |
| [Component Block - <RelatedInstrumentGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_RelatedInstrumentGrp.html) | N |  |  |
| 54 | [Side](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_54.html) | Y | Side of Indication Valid subset of values: 1 = Buy 2 = Sell 7 = Undisclosed (for IOIs) B = As Defined (for multilegs) C = Opposite (for multilegs) |
| 854 | [QtyType](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_854.html) | N |  |
| [Component Block - <OrderQtyData>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_OrderQtyData.html) | N | Insert here the set of [<OrderQtyData>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_OrderQtyData.html) fields The value zero is used if [NoLegs <555>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_555.html) repeating group is used Applicable if needed to express [CashOrderQty <152>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_152.html) |  |
| 27 | [IOIQty](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_27.html) | Y | The value zero is used if [NoLegs <555>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_555.html) repeating group is used |
| 15 | [Currency](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_15.html) | N |  |
| 2897 | [CurrencyCodeSource](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_2897.html) | N |  |
| [Component Block - <Stipulations>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_Stipulations.html) | N | Insert here the set of [<Stipulations>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_Stipulations.html) fields |  |
| [Component Block - <InstrmtLegIOIGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_InstrmtLegIOIGrp.html) | N | Required for multileg IOIs |  |
| 423 | [PriceType](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_423.html) | N |  |
| [Component Block - <PriceQualifierGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_PriceQualifierGrp.html) | N |  |  |
| 44 | [Price](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_44.html) | N |  |
| 62 | [ValidUntilTime](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_62.html) | N |  |
| 25 | [IOIQltyInd](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_25.html) | N |  |
| 130 | [IOINaturalFlag](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_130.html) | N |  |
| [Component Block - <IOIQualGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_IOIQualGrp.html) | N | Required if any [IOIQualifier](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_104.html) are specified. Indicates the number of repeating IOIQualifiers. |  |
| 58 | [Text](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_58.html) | N |  |
| 354 | [EncodedTextLen](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_354.html) | N | Must be set if [EncodedText <355>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_355.html) field is specified and must immediately precede it. |
| 355 | [EncodedText](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_355.html) | N | Encoded (non-ASCII characters) representation of the [Text <58>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_58.html) field in the encoded format specified via the [MessageEncoding <347>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_347.html) field. |
| 60 | [TransactTime](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_60.html) | N |  |
| 149 | [URLLink](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_149.html) | N | A URL (Uniform Resource Locator) link to additional information (i.e. https://en.wikipedia.org/wiki/URL) |
| [Component Block - <RoutingGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_RoutingGrp.html) | N | Required if any [RoutingType <216>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_216.html) and [RoutingID <217>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_217.html) are specified. Indicates the number within repeating group. |  |
| [Component Block - <SpreadOrBenchmarkCurveData>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_SpreadOrBenchmarkCurveData.html) | N | Insert here the set of [<SpreadOrBenchmarkCurveData>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_SpreadOrBenchmarkCurveData.html) (Fixed Income spread or benchmark curve) fields |  |
| [Component Block - <RelativeValueGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_RelativeValueGrp.html) | N |  |  |
| [Component Block - <YieldData>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_YieldData.html) | N |  |  |
| [Component Block - <StandardTrailer>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_StandardTrailer.html) | Y |  |  |

### Related Messages

- [QuoteResponse <AJ>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/msgType_AJ_6574.html)
- [NewOrderSingle <D>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/msgType_D_68.html)

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