Roxi Petroleum tanks 25% after NK20 Well disappoints

    By Sergei Balashov     Shares in Roxi Petroleum (LON:RXP) plummeted 25.5% this morning after the Kazakhstan focused company said that initial log evaluation and core indicated that the target Arskum formation is not hydrocarbon bearing.     The company logged the NK20 well after it was drilled to a total depth of 1,600 metres.     As the...