The time to reconsider the value of five-year notes arrived. I am thinking about buying five-year notes as their yields rose too much. A trade betting on flattening is about to lose its charm.
Investors are thinking the BOJ may change its monetary policy sooner than expected and that's why bonds are falling.
Muto's comment reversed sentiment among investors and it is a reason to sell bonds. They're now thinking the economy is still recovering and yields won't keep on falling.