SARAJEVO (Bosnia and Herzegovina), August 7 (SeeNews) â Bosnian hydro power producer Hidroelektrane na Trebisnjici (HET) [BANJ:HETR-R-A] said its net loss narrowed to 6.9 million marka ($4.2 million/3.5 million euro) in the first half of 2020, from 10.3 million marka a year earlier.Â