Oil prices fall as markets price in hopes for a potential Iran nuclear deal, which is viewed as a factor that could affect future oil supply. At the same time, currency markets react to Japan’s yen volatility. Reports say the yen spikes after the United States and Japan confirm a joint intervention aimed at supporting the yen, which was described as fragile. Following the intervention, the Nikkei index declines modestly, with one outlet reporting about a 1% dip. Another report characterizes the intervention as unlikely to fully change the broader dollar-yen direction, citing longer-term, structural factors weighing on the Japanese currency. Taken together, the coverage links two distinct market moves—softer oil prices tied to Iran-related expectations and a sharp near-term yen strengthening tied to coordinated government action—while noting that the yen’s wider trend may continue to be driven by fundamentals beyond the immediate intervention.