Stock Markets Surge In 2026 But Warning Signs Mount As Bond Yields Hit Two-Decade Highs

Global stock markets have delivered impressive gains so far in 2026, defying a backdrop of persistent geopolitical tensions and macroeconomic instability.

The FTSE 100 has climbed around 7.5% since January, while the S&P 500 has surged approximately 12.9% over the same period, and that is before accounting for dividends.

However, a growing number of institutional investors are now sounding the alarm, questioning whether this rally is built on sustainable foundations.

Global oil and gas reserves are dwindling, and disrupted trade routes are keeping energy prices elevated, piling pressure on businesses and households alike.

Higher energy bills leave consumers with less disposable income, making it significantly harder for businesses to deliver the growth that elevated stock valuations currently demand.

Rising energy costs also threaten to reignite inflation, potentially forcing central banks to reverse course and begin hiking interest rates once more.

UK 10-year government bond yields have already climbed above 5.3%, the highest level seen in almost two decades, making this macroeconomic tension increasingly difficult to ignore.

Despite these warning signals, trying to predict precisely when markets will tumble is, as many analysts note, a fool’s errand that even professional forecasters repeatedly get wrong.

Both the UK and US economies have so far proven far more resilient than many expected, and if that resilience continues, current stock market optimism may not be entirely misplaced.

Against this uncertain backdrop, one company that has attracted investor attention is Clarkson (LSE: CKN), widely regarded as the world’s leading shipping services provider.

Clarkson operates as the middleman connecting companies with shipowners to move cargo globally, earning a commission on each transaction, a model that has benefited enormously from trade route disruption.

That advantage was clearly demonstrated in the first half of 2026, when revenue jumped 39% to £413.5m and underlying pre-tax profit surged 56% to £61.5m.

The strong performance prompted management to raise its full-year guidance, with institutional analysts simultaneously ramping up their profit forecasts for the business.

However, disruption cuts both ways, and an extended shutdown of vital trade routes could eventually reduce cargo volumes, weighing on the commissions Clarkson depends upon.

A large pipeline of new vessels entering commercial operation could ease capacity constraints and put downward pressure on freight rates, directly impacting Clarkson’s earnings potential.

Clarkson shares have already risen by over 40% in the past 12 months, meaning any deterioration in the trading environment could introduce significant volatility for investors.

Nevertheless, Clarkson’s market leadership position, cash-rich balance sheet, and demonstrated ability to thrive amid complexity present a compelling, if not risk-free, investment case.

The broader lesson for investors navigating this uncertain environment is that sitting on the sidelines waiting for a crash that may never arrive carries its own very real costs.

Missing years of valuable market gains while waiting for a correction can prove just as damaging to long-term wealth as being caught in a downturn itself.

Staying invested while growing increasingly selective about where capital is deployed remains, for many, the most prudent strategy in a market defined by both opportunity and risk.