7% but then sank back down to finish flat by the close following three straight days of big loss. tepco stock has taken a hit after hit since the earthquake struck japan on march 11th in the nearly three weeks since, more than three-quarters of tepco's market value has been wiped out. japan's nuclear and industrial safety agency says radiation levels in the ocean water off the damaged fukushima daiichi plant are now nearly 4500 times above normal. tepco, which owns the plant, says it has to decommission four of the six reactors. that only adds to the companies troubles. a bank of america merrill lynch report tuesday says tokyo electronic could face compensation claims of $14 billion if its recovery effort takes no longer than two months. according to the same report, claims could reach $37 billion if it takes six months and