Cannot Get Basis

AhmedTrabelsi

Hello, I'm using

https://selectapi.datascope.refinitiv.com/RestApi/v1/Extractions/ExtractWithNotes

to try to get the Basis, but I'm always getting null as response.
This is my request :

{    "ExtractionRequest": {        "@odata .type": "#DataScope.Select.Api.Extractions.ExtractionRequests.PriceHistoryExtractionRequest",        "ContentFieldNames": [            "Universal Close Price",            "Basis",            "Trade Date"        ],        "IdentifierList": {            "@odata .type": "#DataScope.Select.Api.Extractions.ExtractionRequests.InstrumentIdentifierList",            "InstrumentIdentifiers": [                {                    "Identifier": "MIBG-DA1-ES",                    "IdentifierType": "Ric",                    "Source": null                }            ],            "ValidationOptions": null,            "UseUserPreferencesForValidationOptions": false        },        "Condition": {            "QueryStartDate":"2026-02-16T00:00:00+01:00","QueryEndDate":"2026-02-16T00:00:00+01:00"         }    }}

and the response is :

"Contents": [        {            "IdentifierType": "Ric",            "Identifier": "MIBG-DA1-ES",            "Universal Close Price": 29.29,            "Basis": null,            "Trade Date": "2026-02-16"        }

While I can see well that the Basis has a value :

Could you please help with this ?

Best,

Jirapongse

@AhmedTrabelsi

Thank you for reaching out to us.

I checked and found that the Basis content field is available in the Composite, ElektronEODPricing, EODPricing, and Price History report template.

I can retrieve it properly when using the Composite and EODPricing request. For example:

{

    "ExtractionRequest": {

        "@odata.type": "#DataScope.Select.Api.Extractions.ExtractionRequests.CompositeExtractionRequest",

        "ContentFieldNames": [

            "RIC",

            "Universal Ask Price",

            "Universal Bid Price",

            "Universal Bid Ask Date",

            "Universal Close Price",

            "Close Price",

            "Universal Close Price Date",

            "Last Updated Close Price",

            "Last Updated Close Price Date",

            "Series Description",

            "Debt Type",

            "Debt Type Description",

            "Basis"


        ],

        "IdentifierList": {

            "@odata.type": "#DataScope.Select.Api.Extractions.ExtractionRequests.InstrumentIdentifierList",

            "InstrumentIdentifiers": [


                    { "Identifier": "MIBG-DA1-ES", "IdentifierType": "Ric" }

            ],

            "ValidationOptions": {

                "AllowHistoricalInstruments": true

            }

        }

    }

}

The response is:

 "Contents": [

        {

            "IdentifierType": "Ric",

            "Identifier": "MIBG-DA1-ES",

            "RIC": "MIBG-DA1-ES",

            "Universal Ask Price": null,

            "Universal Bid Price": null,

            "Universal Bid Ask Date": null,

            "Universal Close Price": 28.23,

            "Close Price": 28.23,

            "Universal Close Price Date": "2026-02-17",

            "Last Updated Close Price": 29.29,

            "Last Updated Close Price Date": "2026-02-16",

            "Series Description": null,

            "Debt Type": null,

            "Debt Type Description": null,
"Basis": 28.44

        }

    ],

Please contact the Datascope Select support team through LSEG Support to determine why this field is returning null in the PriceHistoryExtractionRequest.