Russia/Ukraine gas dispute leaves ripples

Oil markets remain jittery after Russia's move early this year to halt gas supplies to Ukraine. Although a five-year gas supply contract has now been signed between Russia and Ukraine and gas supplies to Europe are back on track, the issue has highlighted how reliant Europe is on Russian gas.

"Everyone's keeping an eye on the situation because there's now the fear that it will flare up again," says an ICE Brent trader. "A few years ago an incident like this wouldn't have moved the market, but