 Other indices on the Banja Luka Stock Exchange are the FIRS (an index of 13 privatisation-investment funds) and ERS10 (an index of 10 companies from the power utility sector).As of 30 August 2006, the largest company by market capitalisation was Telekom Srpske a.d. Banja Luka, with the market cap of over BAM 1bn (€538m).All of the companies listed on this index include the abbreviation a.d. ("akcionarsko drušvo") at the end of their name, indicating their status of a public limited company.