October 15 (SeeNews) - The blue-chip index of the Belgrade Stock Exchange, the BELEX15, rose on Tuesday, lifted by gains in oil and gas company NIS [BEL:NIIS], household appliances maker Metalac [BEL:MTLC], Aerodrom Nikola Tesla [BEL:AERO], and insurer Dunav Osiguranje [BEL:DNOS], bourse data showed.