SOFIA (Bulgaria), September 10 (SeeNews) - The Bulgarian Stock Exchange said on Tuesday that resort operator Albena [BUL:6AB] and car battery maker Monbat [BUL:5MB] will replace hydraulic equipment manufacturer M+S Hydraulic [BUL:5MH] and diversified group Stara Planina Hold [BUL:5SR] in the composition of the blue-chip SOFIX index as of September 24.