Do Tullow Oil plc, Royal Dutch Shell Plc, Premier Oil PLC and BHP Billiton plc have upside potential? - Investomania (blog)

Investomania (blog)
Do Tullow Oil plc, Royal Dutch Shell Plc, Premier Oil PLC and BHP Billiton plc have upside potential?
Investomania (blog)
I'm feeling upbeat about the prospects for the oil price, which is why I'm focusing on the outlook for shares in Tullow Oil plc (LON:TLW) (TLW.L), Royal Dutch Shell Plc (LON:RDSB) (RDSB.L), Premier Oil PLC (LON:PMO) (PMO.L) and BHP Billiton plc (LON ...and more »