▁listed ▁with ▁a ▁market ▁capital isation ▁of ▁nearly ▁ 1 . 5 ▁billion ▁as ▁at ▁ 3 1 ▁July ▁ 2 0 1 2 . ▁SE M ▁is ▁one ▁of ▁the ▁leading ▁Ex changes ▁in ▁Africa ▁and ▁a ▁member ▁of ▁the ▁World ▁Federation ▁of ▁Ex changes . ▁ ▁Over view ▁ ▁The ▁SE M ' s ▁" O fficial ▁Market " ▁has ▁three ▁market ▁indices : ▁SE M DEX , ▁SE MT RI ▁and ▁SE M - 1 0 . ▁ ▁History ▁The ▁Stock ▁Exchange ▁Act ▁ 1 9 8 8 ▁established ▁a ▁small ▁but ▁th riv ing ▁exchange ▁which ▁is ▁run ▁by ▁the ▁Stock ▁Exchange ▁of ▁Maur it ius ▁Ltd ▁( SE M ), ▁a ▁private ▁limited ▁company . ▁The ▁act ▁also ▁established ▁the ▁Stock ▁Exchange ▁Commission ▁( SE C ), ▁which ▁controls ▁and ▁super vis es ▁stock ▁exchange ▁operations . ▁Two ▁mark ets ▁operated : ▁the ▁Official ▁List ▁and ▁the ▁Over - The - Counter ▁Market ▁( for ▁un list ed ▁shares ). ▁There ▁are ▁around ▁ 4 0 ▁companies ▁listed ▁on ▁the ▁Official ▁List , ▁and ▁around ▁eight y ▁companies ▁quoted ▁in ▁the ▁Over - The - Counter ▁Market . ▁ 1 0 ▁companies ▁are ▁quoted ▁for ▁their ▁deb ent ures . ▁The ▁exchange ▁has ▁class ified ▁these ▁companies ▁into ▁seven ▁categories , ▁namely : ▁banks ▁and ▁ins urance , ▁industry , ▁invest ments , ▁sugar , ▁commerce , ▁le is ure ▁and ▁hot els ▁and ▁transport . ▁There ▁are ▁also ▁two ▁dual ▁listed ▁funds ▁quoted ▁both ▁on ▁the ▁London