On June 23, during trading hours, the U.S. Dollar Index held above 101, and the USD/JPY pair approached the key level near 161.96. This level has drawn attention because a breakout would push the yen into its weakest territory since December 1986. The main theme in the foreign exchange market is tightening: expectations for Fed policy have turned hawkish again, short-term U.S. Treasury yields remain elevated, and the yen’s weakness has brought the possibility of Japanese authorities intervening in the currency market back to the forefront for traders. For investors, this is not just about a stronger dollar—it also impacts global financing costs, carry trades, and pressure on Asian exchange rates.
The Fed is expected to turn hawkish, with the dollar holding above 101.
As of intraday on June 23, the U.S. Dollar Index was near 101.01, close to its weekly high of 101.13. The DXY, which measures the dollar’s performance against a basket of major currencies, has regained strength, primarily driven by shifts in expectations regarding Federal Reserve policy.
According to Reuters, the Federal Reserve held the federal funds rate steady at 3.50% to 3.75% on June 17, but the latest dot plot showed that nine officials anticipate rate hikes before the end of 2026. The statement also removed language previously suggesting potential rate cuts this year. This shift has made it more difficult for markets to continue pricing in easing expectations, with futures markets now significantly increasing bets on the likelihood of a rate hike this year or before September.
Short-term U.S. Treasury yields also provided support. During the session, the 2-year U.S. Treasury yield hovered near 4.22% to 4.23%, approaching its highest level since February 2025. For the foreign exchange market, rising short-term yields enhance the attractiveness of U.S. dollar assets, particularly when monetary policy outlooks in major economies like Japan and Europe remain relatively dovish.
OCBC foreign exchange strategist Sim Moh Siong believes that rising yields and expectations of a more hawkish Federal Reserve are supporting the U.S. dollar. If the U.S. Dollar Index breaks above its 14-month high of 101.97, it could gain additional upward momentum. This level also transforms the 101 mark from a mere psychological barrier into a technical zone where short-term traders monitor whether the dollar can continue to strengthen.
Other major currencies also came under pressure. During the session, the euro traded around 1.1423, the pound around 1.3246, and the Australian and New Zealand dollars around 0.6991 and 0.5704, respectively. Comments from ECB President Lagarde downplaying second-round inflation concerns and political developments in the UK affecting the pound did not alter the day’s main narrative. The market remained focused on whether expectations for U.S. interest rates would continue to rise.
The yen approaches 161.96 as Japan intensifies verbal warnings.
The Japanese yen is one of the most sensitive assets in this round of dollar strength. As of intraday on June 23, the USD/JPY was near 161.59, having briefly touched 161.93, just shy of the 161.96 level. According to Japan Times and Reuters, if USD/JPY breaks above approximately 161.95 to 161.96, it would mean the yen has fallen to its lowest level since December 1986.
The primary reason for the persistent pressure on the yen remains the U.S.-Japan interest rate differential. The U.S. market is once again betting on further rate hikes, while the Bank of Japan’s path toward policy normalization is relatively slow, widening the yield advantage for holding U.S. dollar assets and increasing selling pressure on the yen. A weaker yen benefits Japanese export companies’ profit conversions but also raises import costs—particularly for energy and food—pressuring household purchasing power and inflation expectations.
Japan’s Ministry of Finance has thus become a focal point for the market. Recently, Japan’s Finance Minister, Katsunobu Kato, issued verbal warnings regarding yen fluctuations, stating that Japan is prepared to act if necessary. Traders speculate that Japanese authorities may intervene in the foreign exchange market by buying yen and selling dollars when the yen approaches historical lows.
However, the intervention remains at the level of expectation and cannot be framed as an already implemented policy action. Historical experience shows that Japanese foreign exchange interventions typically generate sharp short-term volatility, forcing short sellers to cover their positions. If the U.S.-Japan interest rate differential continues to widen, a single intervention is unlikely to fundamentally alter the USD/JPY trend. Japanese authorities are more likely to slow the pace of yen depreciation rather than reverse the overall trend.
This also makes the 161.96 level a key dual barrier: on one side, the interest rate differential and strong dollar continue to push USD/JPY higher; on the other, the closer it approaches its near 40-year low, the higher the risk of policy intervention. For short-term traders, this level is not only a technical point but also a policy risk zone.
Oil prices rebound, reigniting inflation concerns in trading.
Outside of foreign exchange, oil prices also re-entered the market spotlight on the same trading day. According to Reuters, oil prices fell by approximately 4% on June 22 due to developments in U.S.-Iran negotiations and news regarding the opening of the Strait of Hormuz. Subsequently, oil prices rebounded, indicating that the market is still awaiting clearer geopolitical and supply signals.
The Strait of Hormuz is one of the world’s most critical channels for crude oil transportation, with about one-fifth of seaborne oil passing through it. Once expectations for resumed transit strengthen, crude supply risks decline, typically putting downward pressure on oil prices. However, as long as progress in negotiations, shipping security, and actual supply restoration remain unconfirmed, oil prices remain prone to volatile swings between news events.
Oil prices affect dollar trading because they influence inflation expectations and central bank policy assessments. If the oil price rebound persists, markets will find it harder to believe that inflationary pressures have subsided, strengthening the case for the Fed to maintain higher interest rates or even raise them further. If oil prices decline again, some inflation concerns may ease.
Currently, oil prices serve more as a secondary indicator alongside the dollar and U.S. Treasury yields, rather than the main driver of today’s foreign exchange market. However, in an environment where Fed expectations have turned hawkish, any rebound in energy prices could amplify market sensitivity to inflation.
Strong dollar trading remains stuck on three unresolved issues.
The most immediate issue in today’s market is whether the Federal Reserve will actually raise rates this year or before September. Speculation in the futures market has clearly intensified, but this is not a commitment from the Fed— the final decision still hinges on upcoming inflation, employment, and growth data. If the data continues to support a hawkish stance, the dollar may remain supported. However, if inflation declines or employment weakens, expectations for a rate hike could quickly cool down.
The second issue is in Japan: the closer the USD/JPY approaches 161.96, the stronger the expectation of intervention becomes; however, it remains uncertain whether Japanese authorities will intervene, the scale of any intervention, and whether the U.S. will cooperate. What the market truly fears is not the verbal warnings themselves, but the potential for sudden volatility caused by intervention.
The third issue stems from oil prices. There remains a gap between U.S.-Iran negotiations, expectations of the Strait of Hormuz reopening, and the actual restoration of supply. If oil prices continue to rebound, they will once again intensify inflation concerns, which in turn could support U.S. Treasury yields and the dollar.
This market cycle is still primarily driven by expectations around U.S. interest rates. Whether the U.S. Dollar Index can break above 101.97, whether USD/JPY surpasses 161.96, and whether Japanese authorities shift from verbal warnings to concrete action will determine whether the foreign exchange market continues its strong dollar trend or enters a period of more intense two-way volatility.