March 17 (SeeNews) - The blue-chip index of the Belgrade Stock Exchange, the BELEX15, rose by 0.21% on Monday, to close at 1,146.58 points, with insurer Dunav Osiguranje [BEL:DNOS] and cookware manufacturer Metalac [BEL:MTLC] being the only blue-chip companies that traded in the day, bourse data showed.