An issue of 3.4 million shares in Opportunity Bulgaria Investment, issued in a recent capital increase, started trading on the Bulgarian Stock Exchange on Thursday, bourse data showed. Opportunity Bulgaria Investment increased its capital to 6.8 million levs ($3.9 million/3.5 million euro) from 3.4 million levs through the issue, BSE data shows.Earlier this month, the company said it has raised 4.76 million levs through the capital increase, as it placed the shares at a price of 1.4 levs each.Opportunity Bulgaria Investment shares last traded on the Bulgarian Stock Exchange at a price of 1.3 levs apiece.