I just run into an issue with my get_data() function in Python API. For example:
check, err = ek.get_data(['00138CAK4='],
['TR.MIDPRICE.date', 'TR.ISIN', 'TR.CUSIP', 'TR.FiPrice', 'TR.FiCurrency', 'TR.MIDYIELD', 'TR.FiMaturityStandardYield','TR.FiOptionAdjustedSpreadDuration'],
{'SDate': '20191231', 'EDate': '20200930', 'FRQ': 'M'})
It turns out only the field “TR.MIDYIELD” would support historical data while the rest only gives current value whatever dates I put into the formula.
Is there’s any way to retrieve these fields historically (assuming RDP library but a sample code would be great) or indeed see what fields are time series without going into DIB.
Best,
Danny