There are quite a few instruments which are not returning any records using the Entity Search API. To give a few examples: <ECC.N>, <RNP.N>, <VKI.A>, <HOLD.P>, <TECS.P>, <HTF.N>. Do the instruments in the database exclude certain instruments? Or is the database still incomplete?
Only equity instruments and quotes are included for the moment. The rest of the universe of exchange-traded instruments is planned for the near future, likely end of q2 or early q3.