(Bloomberg) -- The search for fast-vanishing yields became even harder this week in Japan. They dipped below zero on the government's 20-year bonds for the first time, leaving only the 30- and 40-year among debt securities that haven't gone negative. Yields for shorter-dated notes went sub zero earlier this year when the Bank of Japan followed Europe by adopting negative rates.
For a QuickTake explainer on negative rates, click here
To contact the reporter on this story: Naoto Hosoda in Tokyo at nhosoda@bloomberg.net. To contact the editors responsible for this story: Tomoko Yamazaki at tyamazaki@bloomberg.net, Jake Ulick
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