Global markets are heading into one of the more demanding weeks of the year, with investors juggling three distinct pressure points at the same time: fresh geopolitical risk around Iran and the Strait of Hormuz, shifting signals on interest rates from major central banks, and a wave of Big Tech earnings that will test whether AI-driven growth stories still hold up.

Why the Strait of Hormuz matters

Tensions involving Iran and the Strait of Hormuz are back in focus. The strait is one of the world's most critical oil shipping lanes, carrying roughly a fifth of global crude supply. Any disruption there tends to push oil prices higher quickly, which feeds into inflation expectations and complicates the rate-cutting calculus for central banks already moving carefully.

The US Federal Reserve and European central banks are both under watch this week. Markets have spent much of this year repricing how fast and how far rate cuts will actually come. Each new data point or official comment can shift bond yields, currency pairs, and equity valuations in short order. Investors will be parsing any language that hints at a faster or slower pace of easing.

Big Tech earnings as the third variable

Alongside the macro noise, major technology companies are due to report earnings. The specific focus is on results tied to artificial intelligence — whether AI investment is translating into actual revenue growth or whether costs are running ahead of returns. After a long stretch where AI enthusiasm drove large valuation gains across the sector, any disappointment in guidance or margins could prompt a sharp reassessment.

The three factors are not independent. Higher oil prices from geopolitical stress could keep inflation sticky, pushing central banks to hold rates higher for longer. That, in turn, raises the discount rate applied to future tech earnings, which makes richly valued AI stocks more vulnerable. The feedback loop runs in both directions if any one variable surprises positively.

Watch for central bank commentary, any escalation or de-escalation around the Strait of Hormuz, and the tone of AI-related revenue guidance from tech majors. How those three threads interact will likely set the direction for equities, bonds, and commodities through the rest of the week.