There appears to only be data for `IEF.O`IEI.O`SHV.O`TLT.O RICs as far back as 2017.08.02 and `GOVT.K as far back as 2012.02.15. I am wondering has the data been recored under another RIC prior to these dates? Or could you advise how I could get data priot to these dat? Thanks in advance
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