While authorities have typically refrained from immediately confirming currency interventions, they usually issue warnings beforehand — an intentional, strategic ambiguity that keeps the element of surprise to maximize market impact. Richard A. Brooks | Afp | Getty Images After multiple warnings against the "speculative" and "one-sided" currency moves, Japan's Ministry of Finance appears to have put its money where its mouth is and intervened in the yen during the country's Golden Week holiday.  The first intervention, reportedly on April 30, came after the yen weakened past the politically sensitive 160 yen level, marking the first yen-buying operation since July 2024. The yen surged by as much as 3% on that day, according to LSEG data. The yen appreciated sharply again Wednesday, fuelling market speculation that Tokyo had stepped into the currency market for a second time in recent days.…