Umbra's Model Portfolio Service delivered strong absolute and relative returns in August, with equity and liquid alternative exposures the primary drivers of outperformance versus the ARC benchmark. Higher-risk MPS portfolios performed particularly well, in some cases returning approximately double the ARC index for the month. Active regional equity manager selection was a standout contributor: the Arcus Japan Fund outperformed its benchmark by 3%, the Man Asia Fund (with South Korean and Taiwanese exposure) beat by around 2%, and the TB Evenlode UK Income Fund finished roughly 1.7% ahead of its index. European equity holdings benefited from strong performance in banks and technology names such as ASML, while UK mid-cap exposure returned 4.6%, supported by sustained buyback activity and an active M&A environment with approximately £110 billion of announced transactions year-to-date.

The Federal Reserve left rates unchanged at 3.50%–3.75%, with Chair Warsh using his Jackson Hole address to deliver a firmly hawkish message. He reaffirmed the Fed's 2% inflation target and made clear that the era of central bank guidance and market hand-holding is over. US economic data nonetheless remained resilient - non-farm payrolls printed at 127,000 against a consensus of 50,000, with manufacturing PMI at 53.9 and services at 56.5 - though a growing divergence between the AI and technology economy and the broader consumer and industrial economy is becoming increasingly apparent. In Europe, the ECB took a similar stance, with August CPI at 3.3% and markets pricing a September rate hike. UK data was mixed, with services and construction disappointing, and markets cautious on the fiscal direction under the new Burnham administration.

The MSCI World returned 2.6% for the month, with emerging markets marginally ahead at 3.4%, partly aided by a softer US dollar. Nvidia's strong results and forward guidance provided a positive read-through to the broader semiconductor and AI supply chain, contributing to a 3.9% gain for Japan's TOPIX. The 2026 global EPS growth estimate rose to approximately 34% year-on-year following an encouraging second-quarter earnings season, with early signs of broadening beyond the technology sector. Sector dispersion was wide: technology gained 6.2% and materials 9.7%, while energy rose 4.6% globally; rate-sensitive sectors such as utilities and real estate fell 3.2% and 3.4% respectively. Healthcare was the strongest defensive performer, up 3.7%, with positive developments around personalised mRNA cancer vaccines supporting sentiment and earnings upgrades across the sector.

Government bonds remained under pressure across major markets. The UK 10-year Gilt ended August at 5.20%, the US 10-year at 4.75%, and the German Bund at 3.32% - levels not seen in over a decade in several cases. The 30-year US Treasury yield briefly touched 5.31%, its highest in nearly two decades. An announcement by the US Treasury to accelerate long-dated bond buybacks provided only limited reassurance and raised questions over Fed credibility, with Chair Warsh's remarks making clear that central bank support for bond markets should not be anticipated. Higher-beta segments held up better - global high yield returned 1.0% and emerging market local currency bonds 1.1% - but the broader picture reinforces that conventional fixed income can no longer be relied upon to provide capital preservation in risk-off episodes.

Gold's 12.8% gain was the most notable development in alternatives and commodities during August. The combination of the US Treasury's buyback announcement, the currency debasement narrative, and persistent central bank buying from the developing world drove a sharp move higher. The firm's targeted alternatives exposures - including infrastructure, global real estate, and systematic return strategies - are increasingly coming to the fore for clients in a period when bonds are failing to perform their traditional diversifying role. However, rising long-end yields weighed on rate-sensitive real assets through the month, with the MSCI World Real Estate index declining 3.4%, illustrating the valuation sensitivity of these asset classes to the current yield environment.

August reinforced several of the structural themes central to Umbra's investment philosophy. The year so far has demonstrated the importance of genuinely diversified multi-asset portfolios in a world characterised by persistent geopolitical tensions, elevated indebtedness, and structural inflation that has fundamentally altered the role bonds play within portfolios. Umbra believes the transition away from the traditional 60/40 model is not cyclical but secular, and the performance of alternative return streams - gold, infrastructure, systematic strategies - in August provides a concrete illustration of why targeted diversification beyond conventional fixed income matters for clients over the medium term.