Japan just put a ‘Band-Aid’ on the yen. Why high oil prices could soon rip it off.

japan's finance ministry stepped in to prop up the yen after it hit a roughly 40-year low against the dollar. the intervention is a temporary fix — a "band-aid" — because high oil prices are adding to inflation fears in the country. japan imports almost all its oil, so a weak yen makes those imports more expensive, feeding into broader price pressures. the bank of japan just acted to rescue the currency, but the underlying problem hasn't gone away. if oil stays elevated, the yen could come under renewed selling pressure, forcing another round of intervention. the boj is stuck between supporting the yen and keeping a lid on import-driven inflation.