The real price of Occidental's 'costless' oil hedge

(Reuters) - In just 12 days, Occidental Petroleum Corp pulled off one of the biggest hedges against falling oil prices ever placed by a U.S. energy company. It characterised the transaction as "costless" but a Reuters review of regulatory filings, market data and interviews shows that's not the whole story.The aim of the complex financial maneuver, the company said, was to help preserve Occidental's generous dividend to shareholders as it sought to take over rival Anadarko Petroleum for $38..