Dollar weakens against euro, yen as Iran talks lift risk appetite

The US dollar declined against the euro and the yen after reports of progress in Iran talks, which lifted investor risk appetite and reduced demand for traditional safe-haven currencies. The move reflects a risk-sentiment channel: diminished geopolitical tension tends to draw capital out of defensive positions and into higher-yielding and cyclical currencies, pressuring the dollar's haven status. The yen and Swiss franc, which typically benefit from flight-to-safety flows, are most sensitive to this unwinding, while commodity-linked currencies such as the Australian and Canadian dollars and the New Zealand dollar may gain on improved growth expectations. Oil-sensitive assets and the Iranian rial would be the most directly exposed to any durable easing of Middle East supply concerns. Traders should watch the next US Consumer Price Index release and any official statements from the negotiating parties, since a hot inflation print or a breakdown in talks could quickly reverse the dollar's losses.

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