Dollar gains as oil bites

The dollar firmed and most Asian currencies weakened as conflict-related risk aversion and higher oil prices fed demand for the greenback. The move matters because it links three market pressures at once: haven flows into the dollar, renewed inflation concern from energy, and a fresh squeeze on oil-importing currencies such as the Indian rupee.

Dollar heads for its strongest week since early March

The clearest market move in the source material is a broader rise in the U.S. dollar. Investing.com reported that the dollar index and related dollar gauges were marginally higher in Asian trading and up about 0.8% for the week, which would mark the strongest weekly performance since early March.

The main driver was persistent uncertainty around the U.S.-Iran conflict. The report said markets saw little sign of a quick resolution, even after Washington indefinitely extended a ceasefire with Iran this week. At the same time, Iran was reported to have continued attacks on ships in the Strait of Hormuz, while the U.S. maintained its naval blockade in the region. President Donald Trump also said on Thursday he was in no rush to end the war.

For forex markets, that combination supported the dollar in two ways. First, it lifted demand for the greenback as a liquid haven during a period of weaker risk appetite. Second, it reinforced concern that higher energy costs could keep inflation pressure alive and reduce expectations for near-term Federal Reserve rate cuts.

Yen weakens despite firmer Japan inflation

The Japanese yen fell even after Japan's March inflation data came in stronger than expected. According to Investing.com, USD/JPY rose nearly 0.2% and stayed close to its weakest level since July 2024.

The reaction shows that the inflation print was not enough to convince markets that the Bank of Japan will raise interest rates at its next meeting. The report said much of the price pressure came from fuel and transportation, likely linked to Middle East tensions, while Tokyo's subsidy measures continued to limit broader cost increases.

That left traders focused less on the inflation surprise itself and more on the policy message ahead. Markets still widely expect the BOJ to keep rates unchanged next week. The yen's weakness therefore looked less like a verdict on inflation and more like a sign that interest rate support for the currency is still limited for now.

Asian currencies slip as oil pressure builds

The broader regional picture was also weaker. Investing.com said USD/CNY rose nearly 0.2% on Friday and was on track for mild weekly gains. USD/SGD and USD/KRW also moved higher, while AUD/USD was little changed.

The Indian rupee came under clearer pressure. USD/INR rose 0.2% and moved further above the 94 level, putting the rupee back near recent record lows against the dollar. The report linked that move to two factors: a spike in oil prices, which is especially damaging for a large energy importer like India, and the Reserve Bank of India's earlier decision this week to loosen some measures that had been supporting the currency.

This is an important forex link because oil does not just affect inflation expectations in the abstract. It also changes a country's import bill, demand for dollars, and the pressure on central banks trying to steady their currencies.

Oil shock keeps feeding the currency story

A separate FXStreet item, attributed to Rabobank strategists and published on March 23, adds detail on the energy side of the move. It said Brent and WTI surged close to $120 a barrel on March 19 as the Middle East war intensified and the Strait of Hormuz was effectively shut. It also said physical crude prices had moved above that level, with Dubai crude above $150 to $166.

Rabobank said it now expects the strait to remain fully closed until the end of April, with crude and refined product flows recovering only gradually and reaching about 80% of prewar levels by August. The bank estimated average Brent prices of $107 a barrel in the second quarter, $96 in the third quarter and $90 in the fourth, with WTI averaging $98, $88 and $83 over the same periods.

Those figures matter for forex readers not as a forecast to trade on, but as evidence of why the dollar has found support and why oil-sensitive currencies are under strain. If energy flows are being repriced as a prolonged supply shock rather than a brief disruption, currencies are reacting to a more persistent inflation and balance-of-payments problem.

Oil, rates expectations and haven demand are now reinforcing each other. The dollar is benefiting from its role as the market's main source of liquidity during stress, while currencies with weaker policy support or heavier energy-import exposure are absorbing the pressure. That is the clearest signal from the current forex news flow.