The rare joint intervention – the first since 2011 - aimed to prevent a selloff in the yen and Japanese government bonds from causing global spillovers.

Japan and the U.S. may unveil a joint policy next week to defend the yen after record interventions in April and May.

TOKYO, Aug 2 — Washington and Tokyo jointly intervened to shore up the Japanese yen for the first time in nearly 30 years after the currency sank to its weakest level in…