BOJ mindful of risks from excessive fall in super-long yields - senior official

TOKYO (Reuters) - The Bank of Japan is guiding its ultra-loose monetary policy with an eye on the risk that excessive declines in super-long government bond yields could hurt the economy, a senior BOJ official said on Friday."We're mindful that excessive declines in super-long bond yields, such as those with maturity of 20 years, could hurt public sentiment and economic activity by lowering the interest life insurers and pension funds earn from their investment," BOJ Executive Director Eiji..