USD/JPY Nears 40-Year High as Dollar Firms on US-Iran Optimism

USD/JPY is inching toward 40-year highs as the dollar firms broadly on Monday, buoyed by investor optimism surrounding the first round of US-Iran nuclear negotiations. The diplomatic progress has reduced geopolitical risk appetite, paradoxically supporting the safe-haven dollar while undermining the yen, which has suffered from persistent yield differentials between US and Japanese government bonds. The pair's push toward multi-decade levels significantly raises the probability of intervention by Japan's Ministry of Finance, which has historically acted near psychologically significant thresholds. The dollar's strength is broad-based, with the DXY holding steady as markets price in continued elevated US interest rates relative to major peers. Iran-related optimism has also pressured crude oil prices, which could indirectly benefit Japan as a major energy importer, though this has yet to materially support the yen. Near-term resistance for USD/JPY sits at the 40-year high, while support lies at prior consolidation zones. Traders should exercise caution given elevated intervention risk and monitor US-Iran developments closely.