SOFIA (Bulgaria), May 13 (SeeNews) – Czech energy group CEZ said on Tuesday it turned to negative earnings before interest, taxes, depreciation and amortisation (EBITDA) from power production and trade in Bulgaria of 100 million Czech crowns ($5.0 million/3.6 million euro) in the first quarter of 2014 from a positive EBITDA of 100 million crowns a year earlier.