Asian equity markets struggled for traction on Monday as investors grappled with a combination of geopolitical uncertainties and shifting expectations around monetary policy. The region's broader decline reflected deepening concerns about stability in the Middle East, which sent crude oil climbing and reshaped the calculus around when the Federal Reserve might begin tightening policy. The mood was further darkened by political upheaval in Britain, where Sterling weakened on reports that Prime Minister Keir Starmer's position within his own Labour Party had become precarious following a dramatic electoral setback for a rival.

Tensions in the Middle East proved the principal driver of Monday's market movements. Iran's renewed blockade of the Strait of Hormuz, one of the world's most critical shipping chokepoints through which roughly 20% of global crude passes, unsettled investors and reignited concerns about crude supply disruptions. The number of vessels passing through the strait had dwindled markedly, with only 26 ships making the crossing on Saturday compared to 32 on Friday, signalling heightened commercial caution. These developments pushed Brent crude futures 1.1% higher to $81.43 per barrel, though prices remain substantially beneath their May peak of $126.41. American crude oil climbed more steeply, rising 2.7% to $78.70 a barrel, underscoring the added pressure from geopolitical risk premiums.

The broader Middle East situation showed few signs of stabilisation. US President Donald Trump posted that British Prime Minister Starmer was preparing to resign, simultaneously threatening further military strikes against Iran. These inflammatory remarks came even as Vice President JD Vance engaged in talks with Iranian officials under an interim peace framework, creating considerable confusion about the administration's actual negotiating posture. The disconnect between diplomatic engagement and military threats exemplified the uncertainty plaguing markets, making it difficult for investors to assess whether de-escalation or further conflict was the more probable outcome.

This geopolitical uncertainty translated into tangible market movements across Asia-Pacific. Japan's Nikkei index managed a modest gain of 0.7%, riding momentum from a remarkable rally the previous week when the gauge had climbed nearly 8% to establish fresh all-time highs. South Korea's market told a different story, slumping 0.9% after an extraordinary surge exceeding 11% the prior week, largely driven by international appetite for semiconductor equities. The broader MSCI Asia-Pacific index, excluding Japan, drifted down 0.4%, suggesting that while some pockets of strength remained, the region-wide sentiment had turned cautious. Futures markets pointing to the major US benchmarks reinforced this defensive tone, with the S&P 500 futures easing 0.5% and Nasdaq futures losing 0.7%.

European stock markets showed similar weakness. The EUROSTOXX 50 futures declined 0.5%, while Germany's DAX futures retreated 0.3% and London's FTSE futures edged down 0.1%. These declines reflected not only the global geopolitical backdrop but also specific domestic concerns, particularly in Britain where Starmer's political standing appeared increasingly fragile. The Labour Prime Minister faced mounting internal party pressure following Andy Burnham's overwhelming victory in a parliamentary election, which emboldened rivals within his own government to publicly question his leadership. Such political instability raised questions about the UK's fiscal trajectory and the government's ability to implement its legislative agenda, introducing another layer of uncertainty into an already volatile environment.

Underlying much of Monday's retrenchment was a fundamental reassessment of US monetary policy expectations. The Federal Reserve's shift toward a more hawkish stance in recent days had prompted financial markets to reprice the odds of rate increases, with traders now assigning a 75% probability to a rate hike as early as September. This represented a dramatic tightening of expectations. Futures markets were now implying approximately 38 basis points of monetary tightening before year-end, a material shift from earlier assumptions. Two-year Treasury note yields rose 4 basis points to 4.2276%, their highest level since early 2025, reflecting the market's growing conviction that borrowing costs would remain elevated for an extended period.

JPMorgan's cross-asset strategists, however, attempted to inject a note of nuance into these market expectations. Fabio Bassi, heading the bank's cross-asset strategy team, suggested that the most probable baseline scenario still pointed toward the Fed's first rate increase coming in the second half of 2027, a considerably later timeline than market pricing implied. Yet Bassi acknowledged that the margin for policy error had narrowed considerably, with legitimate risks of accelerated tightening should inflationary pressures persist or re-emerge. This cautious optimism, contingent on labour market strength supporting economic growth without reigniting price pressures, underpinned JPMorgan's continued constructive stance on risk assets, though the bank recognised that leadership would likely narrow toward quality growth, large capitalisation companies, and technology stocks.

The inflation picture remained crucial to Fed decision-making. On Thursday, markets would receive the central bank's favoured inflation gauge in the form of the core personal consumption expenditures price index for May, forecast to rise marginally to 3.4%. The Fed still maintains inflation above its 2% target, providing justification for keeping rates elevated and potentially raising them further if evidence of persistent price pressures accumulates. Beyond Thursday's inflation data, remarks from Federal Reserve Governor Christopher Waller and New York Federal Reserve President John Williams would be closely monitored for any additional signals about the Committee's thinking.

The dollar benefited from the Fed's relatively hawkish positioning and expectations of prolonged high rates. The US currency strengthened to 161.44 Japanese yen, with traders noting that only the threat of Japanese central bank intervention prevented testing of resistance at 161.96, a level the pair had touched in mid-2024. Such appreciation reflected the traditional investor response to widening interest rate differentials, as higher US rates attract foreign capital seeking better returns. The euro weakened to $1.1462, having tumbled to a three-month low of $1.1418 on Friday as broader growth concerns in the eurozone took hold.

British political turbulence manifested in Sterling's performance. The currency declined 0.2% to $1.3210 as market participants worried about the implications of potential leadership instability in London. NAB's head of market research, Skye Masters, warned that gilt bonds would likely come under persistent selling pressure at the outset of the week, as investors reassessed the fiscal outlook under conditions of potential political transition. Such expectations of sustained gilt weakness highlighted how deeply political uncertainty could penetrate financial markets, extending beyond currency movements to fixed income valuations.

Commodity markets reflected the challenging backdrop. Gold, which pays no interest and therefore becomes less attractive when yields rise, slipped 0.1% to $4,154 per ounce as higher bond yields reduced the opportunity cost of holding interest-bearing assets. The precious metal's weakness underscored how extensively rising rate expectations rippled through asset classes, affecting not merely equities and currencies but also traditional safe-haven holdings. For Malaysian investors and exporters, the combination of regional market weakness, elevated oil prices, stronger US dollar, and higher global bond yields created a complex landscape requiring careful navigation of currency exposure, growth expectations, and inflation implications for regional economies increasingly integrated into global supply chains.