By Chris Oliver
HONG KONG (MarketWatch) - Japanese authorities declared a state of nuclear emergency late Friday, following a record earthquake earlier in the day that triggered emergency shutdowns at a number of nuclear plants near the quake’s epicenter. The government said no radioactive leaks had been reported and residents living near nuclear power plants were not under any immediate threat. The four nuclear power plants nearest to the quake’s epicenter had been safely shut down, while (…)