The US dollar extended its advance on the final trading day of June, with the dollar index reaching 101.32, a level not seen since May 2025. The move reflected a repricing of Federal Reserve policy expectations after a more hawkish tone from the central bank’s new leadership, with markets now anticipating a first rate increase as early as October 2026. The broad-based dollar strength rippled through foreign exchange markets, pushing a range of emerging market currencies to multi-month lows and amplifying the effects of local pressures.

Analysts in London and New York note that the shift in rate expectations has been compounded by geopolitical uncertainty. The fragile ceasefire between the United States and Iran, punctuated by weekend exchanges of fire, kept safe-haven demand for the dollar elevated even as both sides signalled a willingness to hold technical talks in Doha. Oil prices, meanwhile, remained near their lowest since late February, with Brent crude trading around $73 per barrel, undermining the currencies of commodity-exporting nations. The Russian ruble, for instance, weakened sharply against the yuan and the dollar as the Bank of Russia prepared to slash its daily foreign currency sales from 4.62 billion rubles to just 0.58 billion rubles starting July 1, a move that market participants in Moscow say will reduce a key source of support.

In Latin America, the Argentine peso breached the symbolic 1,500 per dollar threshold in the official market, its weakest since November 2025. Analysts in Buenos Aires attribute the slide to a seasonal decline in agricultural export liquidations and a moderation in the central bank’s dollar purchases, which fell to just $25 million on June 29. The Brazilian real weakened toward 5.20 per dollar, pressured by month-end Ptax formation and global risk aversion, while the Colombian peso depreciated ahead of a central bank decision later in the day that was widely expected to raise the benchmark rate by 50 basis points to 11.75%. In Africa, the Nigerian naira slipped at both the official and parallel markets, though the spread between the two remained narrow at around 20 naira per dollar, a sign of relative stability compared with earlier months.

Asian currencies also came under pressure. The Indian rupee fell for a third consecutive session to 94.65 against the dollar, driven by month-end corporate demand and safe-haven flows, with traders in Mumbai watching the 95.10 resistance level. The Mexican peso, by contrast, eked out a marginal gain of 0.12% to 17.45 per dollar, supported by a slight improvement in risk sentiment after the US Supreme Court upheld the independence of a Federal Reserve governor, easing fears of political interference in monetary policy.

The immediate focus now shifts to US employment data due later in the week, which could either reinforce or challenge the rate-hike narrative. In Colombia, the central bank’s rate decision on June 30 will set the tone for local assets, while the start of reduced currency sales by the Bank of Russia on July 1 and the formation of the month-end Ptax in Brazil are likely to inject further volatility into already jittery markets.