The dollar advanced to its strongest level in nearly two months on Wednesday, fueled by persistent U.S. inflation pressures and a wave of hawkish comments from Federal Reserve officials. Market participants increasingly bet on further rate increases in the short term, channeling more capital into the greenback. Meanwhile, international oil prices have retreated from recent highs, though their future trajectory could shape global inflation trends and become a key variable for central bank policy worldwide.

On Wednesday, the dollar index, which measures the currency against a basket of six major peers, rose 0.36% to 100.92. Most non-U.S. currencies came under pressure, with the euro sliding to its lowest since late July, down 0.37% at $1.1405. Sterling dipped as much as 0.5% to $1.3273, marking its weakest level since early July.

The core driver of forex trading recently has been the aggressive rate hikes and hawkish rhetoric from major central banks. The seven-month-old U.S.-Israeli conflict with Iran has pushed energy prices higher and stoked inflation worries, prompting investors to reassess global interest rate trajectories. Last week, the Fed raised its benchmark rate by 25 basis points to a range of 3.75%-4.00%, its first hike in over three years. Several Fed officials signaled this week that further tightening may be required if inflation does not cool quickly enough.

ING strategist Francesco Pesole noted that this again shows the Fed remains the dominant narrative in markets, and hawkish comments from officials are sufficient to sustain dollar demand. Energy markets continue to be a major factor influencing the dollar and global monetary policy outlook. Brent crude futures gained about 1% on Wednesday, climbing back above $100 per barrel and snapping a five-day losing streak. Earlier, there were hopes that diplomatic efforts during the UN General Assembly could push toward a resolution of the seven-month Middle East war, which had driven oil prices down from highs. Since the conflict erupted in late February, Brent futures have risen roughly 37% cumulatively.

Physical energy prices face even more acute pressure, with European prices up at least 75% and U.S. prices at least 40%. Pesole said it remains uncertain whether the earlier pullback in oil can evolve into a sustained decline. From an interest rate perspective, if crude stays in the $90-$100 range, it may not be enough to prompt a clear shift toward more dovish monetary policy expectations. In other words, unless energy prices see a more persistent and significant drop, the inflation pressure facing the Fed and other major central banks will remain difficult to ease.

Although crude has fallen from recent peaks, refined product prices stay elevated. Diesel, one of the most critical transportation fuels, has surged to record highs—U.S. diesel prices have hit all-time records, and European diesel has reached multi-year highs—meaning transport and logistics costs could keep feeding into goods prices. President Donald Trump said Tuesday he supports considering a ban on diesel exports to lower domestic U.S. prices. However, analysts warned this could disrupt global energy supply flows and backfire. In a UN speech, Trump also warned of potential further U.S. military action against Iran if no deal to end the war is reached, while hinting that an agreement could emerge soon as diplomatic efforts continue in New York.

MUFG forex analyst Michael Wan noted the positive development is that oil prices have eased from highs, but since it remains unclear whether and when the conflict will be resolved, the outlook is still highly uncertain. For forex markets, oil and the dollar now form a key policy transmission chain. Persistently high energy costs can lift business expenses and consumer prices, keeping inflation elevated; the more stubborn inflation is, the higher the likelihood the Fed maintains high rates or even hikes again, and higher U.S. rates support the dollar. Recent economic data also points to robust U.S. demand, while Fed officials are increasingly focused on inflation pressures beyond energy and supply shocks, keeping markets alert to possible near-term hikes.

However, if Middle East tensions ease and push oil prices down sustainably, global inflation pressure could decline, potentially prompting markets to adjust expectations for the Fed and other major central banks. As the dollar strengthens, the yen remains under pressure, with USD/JPY rising to near 158. The Bank of Japan raised its policy rate last week to the highest level in 31 years, but the move failed to convince investors that further rapid hikes are coming, leaving the yen weak. With the yen approaching the closely watched 160 level, investor wariness over possible Japanese intervention has intensified again. Japanese markets were closed Wednesday for a holiday, leaving liquidity relatively thin. Some analysts believe that if authorities decide to act, the low-liquidity environment could amplify the impact of intervention. Intouch Capital Markets head of Asian FX Kieran Williams said USD/JPY at 160 remains a key risk level, but Japanese officials appear to have reduced advance intervention signals recently and no longer target a specific fixed exchange rate, so actual action could come earlier and take different forms.