A USAF Rockwell B-1 Lancer bomber takes off over the Cotswold village of Kempsford in England. The UK government announced over the weekend it would let American forces use British bases to strike Iranian sites that target the Strait of Hormuz, a vital shipping route through which about 20% of the world’s oil and gas flows.

• For more financial news, visit News24 Business.
  

The dollar rose on Monday as escalating retaliatory threats in the Middle East conflict curbed risk appetite and lifted demand for safe-haven ‌assets.

The rand was trading close to R17.25/$ on Monday morning, from Friday’s strongest levels of around R16.75. The local currency, which is sensitive to global risk aversion, has lost almost 8% over the past month and is trading at levels last seen in November 2025.

The Australian dollar, also a liquid proxy for global sentiment, slid as equities sold ⁠off across Asia. Japan's top currency diplomat said his government is ready to take action to counter foreign-exchange volatility as the yen ⁠edged lower.

Hopes for an off-ramp to hostilities dimmed over the weekend, with US President Donald Trump threatening to strike Iran's electricity grid and Tehran vowing to hit back at infrastructure of its neighbours. The head of the International Energy Agency (IEA) said the crisis is worse than the two oil shocks of the 1970s put together.

"The market's going with ‌the idea that those countries and economies that enjoy a positive supply shock from energy are likely to perform better than those that are suffering from a negative supply shock," Rodrigo Catril, a currency strategist at National Australia Bank, said on a podcast.

"So you're seeing the euro and the yen struggling to perform. And ‌again, if this conflict proves long-lasting, you would think that those are the currencies that are likely to suffer a bit more."

The dollar index, which measures the US currency against a basket of peers, rose 0.29% to 99.83. The gauge on Friday closed out its first weekly decline since the start of the war, as the inflationary effects of surging oil prices prompted central banks to turn hawkish.

The euro sank 0.38% to $1.1526, as the ‌yen weakened 0.22% to 159.55 per dollar. ⁠Sterling weakened 0.37% to $1.329.

The conflict broadened on Monday, with Israel announcing wide-scale strikes on Tehran, while Saudi Arabia said two ballistic missiles had been launched at Riyadh.

Trump issued his latest threat to Iran on Saturday, less than a day after signaling the US might be considering winding down the conflict. Iran pledged retaliatory strikes on infrastructure in nearby countries and that the Strait of Hormuz shipping lane for oil would remain closed.

The prospect of tit-for-tat strikes on civilian infrastructure in the region threatens the livelihoods of millions of people who rely on desalination plants for water.

With the yen weakening back toward the key 160 per dollar level, Japan's top currency diplomat Atsushi Mimura signalled caution about speculative activity in oil markets spilling over into foreign exchange.

Speaking in Sydney, IEA Executive Director Fatih Birol warned that the current crisis poses a major threat to the global ⁠economy, surpassing the Middle East energy shocks of the 1970s.

Major equity indexes across Asia tumbled, with Japan's Nikkei down as much as 5% at one point. Inflation concerns hit global debt markets, with Japanese government bonds falling sharply, and the 10-year U.S. Treasury yield rising to a near eight-month high of 4.415%.

Before the US-Israeli war on Iran began in late February, investors had priced in two cuts by ⁠the Federal Reserve this year. But even one cut is now considered a distant prospect, and other major central banks are turning more hawkish.

"If markets price a US tightening cycle, the USD will lift strongly against all currencies in our view," Joseph Capurso, head of international economics at the Commonwealth Bank of Australia, wrote in a note. "AUD would fall against most, if not all, major currencies if global downgrades ⁠occur."

The European Central Bank kept rates on hold on Thursday, but warned of inflation driven by energy prices. The Bank of England also ‌kept rates steady, while ‌the Bank of Japan left the door open to a hike as soon as April.

The Australian dollar sank 0.95% versus the greenback to $0.6956, while New Zealand's kiwi weakened 0.7% versus the greenback to $0.5793.

In cryptocurrencies, bitcoin jumped 0.76% to $68,704.51, while ether rose 0.16% to $2,061.87.

Additional reporting by News24.