Indian Oil chairman says optimistic of getting another waiver from US sanctions

Indian oil corp chairman says may raise $5-$6 billion from overseas markets
Indian Oil chairman says optimistic of getting another waiver from US sanctions MUMBAI: * Indian Oil Corp Chairman says will raise more funds from overseas markets

* Adds may raise $5-$6 billion from overseas mkts

* Indian oil corp chairman on halting iran oil imports: says 'it's a tough call'

* Further adds that optimistic of getting another waiver from US Sanctions