BP shares fell sealing leaking failed one-third of the market value of impairment.

<P> According to the British Financial Times reported that British Petroleum (BP) shares yesterday suffered their biggest one-day 18-year decline. .Leakage in the Gulf of Mexico that its oil well plugging operation failed, investors reaction of shock, causing the market value fell to two-thirds of the level before the incident. .</ P> <P> since since April 20, BP shares have fallen 34%, while the FTSE 100 Index over the same period fell by only 11%. .This makes BP reduced the market value of about 400 billion pounds (58.8 billion U.S. dollars). .</ P> <P> British Petroleum (BP) 29 announced for the closure of the Gulf of Mexico oil spill "top kill" project has failed, the company's next step is to consider using a leak-proof shield absorb oil spills. .</ P> <P> oil spills has been going on for six weeks, BP every attempt to block the action were unsuccessful. .This is by far, the worst in U.S. history, oil spills - more than the 1989 Exxon Valdez tanker oil spill disaster. .The U.S. government estimates, there are 18 million to 40 million gallons of crude oil spilled into the Gulf of Mexico, to the local environment and ecosystems serious harm. .</ P> <P> BP's business in the United States accounted for 40% of the total business volume of about. .• U.S. President Barack Obama said that if BP violated the U.S. law, will be held accountable. .</ P>.