Yen Heads for Biggest Weekly Drop Since May Despite Tokyo's Support Pledges

The Japanese yen is on track for its sharpest weekly decline since May, capping a volatile period that saw the currency hit fresh 40-year lows against the U.S. dollar. This comes despite repeated official efforts by Tokyo to stabilise the yen.

Analysts say verbal intervention has had only a limited impact. They warn that even direct market intervention would likely provide only temporary relief unless the Bank of Japan (BOJ) accelerates the pace of interest rate increases.

U.S. Treasury Adds Pressure for Tighter Policy

The U.S. Treasury Department added to calls for tighter Japanese monetary policy on Thursday, warning that excessive exchange-rate volatility was undesirable. The yen's weakness also reflected broad U.S. dollar strength. The dollar was set for a weekly gain of 0.88%, its strongest performance since May.

Christian Antúnez, Global Fixed Income and FX Associate at Lazard Asset Management, said intervention could buy policymakers time but would not reverse a move driven by economic fundamentals.

Inflation Concerns Support the Dollar

Although softer U.S. inflation data for June initially raised hopes that price pressures were easing, renewed conflict in the Middle East has reignited concerns about higher energy costs and inflation. Oil prices climbed above $100 per barrel this week for the first time in nearly two months.

Federal Reserve Chair Kevin Warsh has repeatedly stressed the central bank's commitment to returning inflation to its 2% target. Macrae Sykes, Portfolio Manager at Gabelli, said one month of encouraging inflation data was not enough to change the Fed's outlook.

Euro and Sterling Hold Steady

The euro rose 0.1% to $1.1388 after the European Central Bank left interest rates unchanged while keeping the possibility of a September rate hike open. ING strategist Michiel Tukker said elevated oil prices continue to increase the risk of second-round inflation effects, leaving markets uncertain about the outlook. According to LSEG data, traders are pricing in a 29.9% probability of an ECB rate hike in September.

Sterling gained 0.15% to $1.3335 after rebounding from a three-week low, while the U.S. Dollar Index eased 0.09% to 101.35.

For Nigerian businesses and importers, a stronger dollar and weaker yen mean that Japanese goods and machinery could become relatively cheaper, while dollar-denominated imports remain under pressure. The yen's volatility also signals broader global currency instability that could affect emerging market currencies like the naira.