On the New York Mercantile Exchange light sweet crude futures for delivery in May traded at $103.37 a barrel at 0515 GMT–down $0.68 in the Globex electronic session. May Brent crude on London’s ICE Futures exchange fell $0.42 to $108.62 a barrel. Ukraine’s acting president said Monday he isn’t opposed to a referendum on greater autonomy for regions. Pro-Russian separatists stood firm against threats of military action. Crude-oil prices have risen since the start of the month as the Ukraine crisis escalated but analysts say the rally is mostly based on technical indicators. “While there is some risk that Russian involvement could provoke western sanctions that might include an embargo on Russian oil exports it’s far from clear that there’s any consensus in support of such a measure,” Citigroup said in a report. Also uncertainty about Libyan oil exports are helping limit the fall in prices, analysts said. Libya […]