The LJSE expanded the range, effective as at Monday, to correct a market imbalance, the bourse said in a statement published on its website.
Shares of Aerodrom Ljubljana, part of the broader SBI20 index of the LJSE, surged 9.89% to an average price of 31.90 euro ($40) in morning trade on Monday amid an overall market upswing.
The blue-chip SBITOP index of the LJSE rose 3.25% to 945.56 points and the SBI20 index gained 2.92% to 4,144.51 by 0921 GMT on Monday.
($ = 0.794 euro)