Renewed fighting between the US and Iran is sending another shock through global markets, with rising oil prices and a sharp increase in government bond yields threatening to complicate the outlook for hedge funds and other risk-focused investors, according to a report by Bloomberg.
Brent crude climbed 0.9% to around $95.50 a barrel on Wednesday, putting the benchmark on course for a fourth advance in five sessions. The latest move reflects growing concerns that further military escalation could disrupt energy shipments through the Strait of Hormuz.
The jump in energy prices is adding to inflation pressures at a time when investors are already grappling with elevated government spending and the huge capital requirements associated with the artificial-intelligence buildout.
For macro and multi-strategy hedge funds, the combination of higher commodity prices and rising rates is creating a particularly challenging trading environment. Markets are increasingly pricing in the possibility that central banks will need to maintain or resume tightening to contain inflation.
The MSCI Asia Pacific Index fell 1.8% to its lowest level in a week, with all 11 industry groups declining. The broader MSCI All Country World Index also slipped to its lowest level in almost a month, while European equity futures pointed to further losses.
Bond markets were under even greater pressure. The 10-year US Treasury yield rose to around 4.81%, its highest level since late 2023, while global government bond yields have climbed to their highest levels since 2008.
Australian government bonds were among the biggest casualties, with the 10-year yield reaching 5.25%, a level not seen since 2011.
The move higher in yields is particularly significant for hedge funds running long-duration equity exposure. Technology stocks, whose valuations are more sensitive to changes in discount rates, are facing additional pressure as investors reassess the prospect of higher-for-longer monetary policy.
Rate expectations have shifted sharply alongside the latest oil move. Markets are now assigning more than a 50% probability of a September rate increase from four major central banks. Traders are pricing a roughly 70% chance of a Federal Reserve hike this month, while a European Central Bank increase on 10 September is almost fully priced in.
Markets are also fully pricing a Bank of Japan move on 18 September 8, while the probability of a Reserve Bank of Australia increase later this month has risen to around 65%.
The prospect of higher rates has also weighed on gold. The precious metal fell around 0.2% to approximately $4,320 an ounce after losing almost 6% over the previous three sessions.
Japan’s yen strengthened modestly to around 159.90 per dollar, while Japanese government bonds weakened. The moves highlight the growing divergence between currency and fixed-income markets as investors reassess the consequences of renewed geopolitical risk.
Hedge funds will also be watching the energy complex closely. A sustained disruption to flows through Hormuz could push crude materially higher, potentially forcing systematic and macro strategies to adjust positions across oil, inflation-linked assets, currencies and rates.
The escalation follows a period of relative calm in which the Trump administration had shifted emphasis away from military action towards economic pressure on Tehran. The US military said it had completed its latest strikes, while Iran reported a missile attack on a US air base in Jordan.
The renewed conflict is adding to pressure already building in global fixed income. The US 30-year Treasury yield has climbed back towards levels seen before Treasury Secretary Scott Bessent expanded a buyback programme designed to help contain long-term borrowing costs.
