I am using eikon API (both for R and python) but I can not manage to get a time series of yields for US1YT=RR (one year US yield). Any idea on where can I find the appropriate 'field'? In excel, it works using 'B_YLD_1' but that does not work in the eikon API.
More generally, how do I find all the available 'fileds' for a given RIC?