Yen slides as BOJ stuns markets with negative rate policy

By Masayuki Kitano SINGAPORE (Reuters) - The yen dived on Friday after the Bank of Japan stunned financial markets by adopting a negative interest rate policy. The Japanese central bank's action comes as investors around the world have been swept up by turmoil in markets amid fears of slackening global growth, a collapse in oil prices and wobbles in China's economy. The BOJ said it was adopting a negative interest rate of -0.1 percent, adding that it would charge interest for excess reserves fin