US independent Anadarko Petroleum received a pounding in the market on Tuesday, after the latest effort to stem the flow of oil leaking from the Macondo well failed over the long holiday weekend. Shares of Anadarko fell 19.5% on Tuesday alone, and the value of the company's stock is down nearly 40% since a blowout on Apr. 20 crippled the Macondo well and killed 11 workers. Anadarko owns a 25% working interest in the BP-operated well.
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