BBC News | Genel shares plunge after cut in oil estimate in Iraqi Kurdistan BBC News Shares in Genel, the oil explorer chaired by former BP boss Tony Hayward, slumped to a record low after it reduced the estimated value of a key field by $1bn. Genel cut the amount of oil it expects to recover from its Taq Taq oil field in Iraqi Kurdistan. Genel takes charge on lower Kurdish oil estimate |