FTSE 100 today: Stocks slide as U.S.-Iran Strait clashes spook markets

Escalating hostilities in the Strait of Hormuz are keeping markets risk-off, with oil steady but European equities weaker and the FTSE 100 down 0.81%. IAG warned full-year profits will miss earlier expectations as jet fuel costs and supply disruptions rise, while Clariant reported first-quarter EBITDA of CHF160.2 million versus CHF162 million expected. Intertek rejected an £8.93 billion EQT offer, UK house prices fell 0.1% in April, and Labour suffered heavy losses in English local elections as Reform UK won more than 300 council seats.

Analysis

The immediate market reaction looks like a classic “headline risk, but not yet regime change” setup. The more important effect is not direction in oil itself, but the second-order squeeze on transport, chemicals, and any UK/Europe consumer names with thin gross margins and high fuel pass-through lag. That favors commodity-linked defensives relative to airlines, freight, and discretionary travel over the next 2-6 weeks if the shipping premium and jet fuel complex stay bid.

IAG is the cleanest expression of this shock because earnings sensitivity is now shifting from passenger demand to cost inflation, and fuel is one of the few line items that can move faster than hedging can fully absorb. The market is still underestimating how quickly a modest sustained uplift in crude can cascade into airline guidance resets, especially when forward bookings are already vulnerable to macro caution. Competitively, low-cost carriers with stronger ancillary revenue and more flexible capacity should outperform full-service carriers on any further spike.

The EQT/Intertek situation is more interesting in a risk-off tape: rejected bids often attract short-term support, but when financing conditions and geopolitical uncertainty worsen simultaneously, the probability of a higher topping bid falls. That makes the offer rejection less of a takeover catalyst and more of a signal that management believes the public market will re-rate the asset once sentiment normalizes. I would not chase the immediate upside unless there is evidence of a competing bidder or a sector rerating.

Contrarianly, the biggest miss may be that the market is treating this as a temporary oil flare rather than a catalyst for policy responses that can unwind the move quickly. If the strait remains open and damage is contained, the risk premium can compress abruptly within days, which would punish crowded shorts in airlines and defense-adjacent hedges. The right stance is tactical: monetize near-term dislocations, not build a thesis around a durable supply shock unless physical flows actually break.

Key Decisions for Investors

• Short IAG or buy put spreads for the next 2-4 weeks; risk/reward favors downside if jet fuel stays elevated, with a clean exit if crude retraces and management reframes guidance.
• Pair trade: long a diversified energy producer basket vs. short a European airline basket over 1-2 months; the spread should widen if fuel costs remain sticky while demand elasticity stays muted.
• Avoid chasing EQT upside from the rejected Intertek bid; wait for a competing offer or a 5-8% pullback before considering a long, since the geopolitical backdrop lowers the odds of an auction being meaningfully improved.
• For tactical traders, buy near-dated call spreads on oil-sensitive transportation hedge names only if shipping insurance/freight data confirms disruption; otherwise the move is likely too headline-driven to sustain.
• If risk appetite normalizes quickly, cover airline shorts into any 3-5% oil retracement; the reversal can be sharp because positioning is likely crowded and the market is pricing narrative more than physical shortage.