Red Sea Chokehold Jolts Global Trade

The Houthi campaign to threaten and selectively block traffic through the Red Sea is not just another regional flare‑up; it is a live demonstration of how a non‑state actor, armed with missiles, drones and a credible intent to disrupt, can shake one of the world’s most important energy and trade arteries.

Key Points

Since late 2023, Yemen’s Houthi movement has combined missile and drone attacks with declared “maritime embargoes” to pressure Saudi Arabia and its allies through the Red Sea and Bab al‑Mandeb Strait.
The Bab al‑Mandeb, a narrow chokepoint linking the Red Sea to the Indian Ocean, carries roughly a tenth of global seaborne trade and a significant share of Middle Eastern oil, making even limited attacks disproportionately disruptive.
Houthi strikes have sunk vessels and killed sailors, triggered large‑scale rerouting around the Cape of Good Hope, driven up freight and insurance costs, and contributed to what trade analysts call the biggest shock to shipping since the pandemic.
Saudi Arabia’s strategy of shifting crude exports from the Gulf to Red Sea ports via its East‑West pipeline has made the Red Sea route economically vital—precisely the leverage the Houthis seek to exploit.
While headlines often use the language of “blockade,” the real power of the campaign lies less in hermetically sealing the waterway and more in imposing enough risk that governments, shippers, and insurers effectively cordon it off themselves.

How the Houthi “blockade” emerged from a broader Red Sea crisis

The current phase of Red Sea disruption did not begin with the most recent declaration of a maritime embargo on Saudi shipping; it evolved out of a sustained pattern of Houthi attacks on commercial vessels dating back to late 2023. From mid‑November 2023 onward, the group launched dozens of missile and drone strikes against ships transiting the Red Sea and Gulf of Aden, initially justifying them as pressure on Israel and its supporters during the Gaza war. Those attacks quickly spilled over into a broader assault on global shipping, hitting vessels with tenuous or no links to Israel and alarming governments far beyond the region.

By early 2024, major shipping lines began diverting vessels away from the Red Sea entirely, opting for the far longer and more expensive route around the Cape of Good Hope. Trade monitors estimate that between November and December 2023 alone, global trade dipped by roughly 1.3% as a direct result of Red Sea attacks, and by March 2024 more than 2,000 ships had rerouted. Maritime traffic through the corridor ultimately fell by close to 80% at one point, effectively hollowing out one of the busiest shipping lanes on earth. That was the backdrop against which the Houthis escalated from ad‑hoc attacks to openly declaring bans and blockades on “enemy” shipping.

What the Houthis have actually declared—and what they can do

Over time, the Houthis have moved from implicit threats to explicit embargo language. They have publicly announced a series of measures: a ban on Israeli vessels in the Red Sea; a broader threat against shipping linked to Israel and its supporters; and, most recently, a maritime blockade or “embargo” explicitly targeting Saudi Arabia’s use of the Red Sea corridor. In broadcast statements carried by regional and international outlets, Houthi leaders have said they will treat Saudi or Israeli ships as legitimate targets and have claimed authority to close the Bab al‑Mandeb to those vessels.

On paper, these proclamations sound like state‑style naval blockades. In practice, the Houthis do not field a conventional navy capable of physically sealing a 30‑kilometre‑wide waterway against all traffic. Their leverage rests on something different: the ability to fire anti‑ship missiles and armed drones from Yemen’s Red Sea coast into a dense, predictable shipping lane, and to demonstrate that willingness with actual hits, including attacks that have sunk ships and killed crew. That combination—declared intent and demonstrated capability—is what has driven the exodus of commercial shipping from the corridor, even though many vessels, especially those under heavy naval escort, continue to transit.

The Bab al‑Mandeb and Red Sea: a narrow hinge in global trade

To understand why these threats reverberate globally, one needs to grasp what the Bab al‑Mandeb and Red Sea represent in the architecture of world trade. The Bab al‑Mandeb is a narrow strait, roughly 26–32 kilometres wide, wedged between Yemen on the Arabian Peninsula and Djibouti and Eritrea in the Horn of Africa. It connects the Gulf of Aden and the wider Indian Ocean to the Red Sea, which then links via the Suez Canal to the Mediterranean and on to Europe. Depending on the estimate, about 10–15% of global maritime trade and a sizeable share of seaborne oil and gas flow through this single passage.

For energy markets, the strait’s importance is magnified by its relationship to another chokepoint, the Strait of Hormuz. When tension or conflict threatens tanker traffic in Hormuz, Gulf producers—especially Saudi Arabia—lean on pipelines that carry crude across the peninsula to Red Sea ports, effectively bypassing the Gulf and Suez bottlenecks in one manoeuvre. Saudi Arabia’s East‑West pipeline system pumps millions of barrels per day from its eastern oil fields to export terminals such as Yanbu on the Red Sea, making the Bab al‑Mandeb not just a shipping lane but the outlet for the kingdom’s primary work‑around when Hormuz is compromised. The Houthis’ declared focus on Saudi shipping, therefore, goes to the heart of how the global system has historically mitigated Gulf risks.

From sporadic attacks to systemic disruption

The scale of Houthi attacks, while modest in raw numbers compared to global shipping volumes, has been enough to create systemic disruption because of where and how they strike. Since late 2023, the group has been responsible for more than a hundred attacks on vessels in the Red Sea and adjacent waters, using anti‑ship missiles, one‑way attack drones, and remotely operated boats. Human Rights Watch and UN reporting attribute the sinking of at least four vessels and the deaths of at least nine sailors to Houthi operations by mid‑2025, including a Liberian‑flagged cargo ship where three crew members were killed in a single strike.

For shipping companies and insurers, the precise number of attacks is less important than the pattern: a narrow corridor with limited room to manoeuvre, a hostile force ashore with the proven ability to hit multiple targets over time, and uncertain rules about which ships will be targeted. That combination has pushed the industry toward risk‑averse behaviour—rerouting around Africa, demanding higher war‑risk premiums, or avoiding the corridor altogether—even when actual attack frequency is relatively low compared to overall traffic. Analysts at the International Crisis Group and other institutions describe this as a classic chokepoint dynamic: you do not need to close the door; you just need to make it look dangerous enough that others stop using it.

Economic impact: costs, delays, and the oil question

There is broad agreement that the Houthi attacks have upended shipping patterns and increased costs; there is less precision about exactly how much of the movement in prices and trade flows is directly attributable to those attacks versus other geopolitical and macroeconomic forces. News agencies and trade bodies report that the wave of rerouting has added weeks to Asia–Europe voyages, increased fuel consumption, and driven container freight and war‑risk insurance premiums sharply higher. Bloomberg has framed the disruption as the most significant shock to global trade since the COVID‑19 pandemic, a view echoed by logistics firms that have scrambled to reconfigure schedules and inventory buffers.

Oil markets have also reacted, though teasing out precise causality is harder. Commentators and market analysts have linked spikes in Brent crude prices—sometimes pushing toward or above $100 per barrel—to a mix of Houthi activity in the Red Sea, tension around Hormuz, and broader regional confrontations involving Iran and its allies. The Houthis’ declared goal of blocking Saudi exports via the Red Sea, combined with Iran‑related constraints in the Gulf, raises the spectre of a dual chokepoint scenario in which both Hormuz and Bab al‑Mandeb are at risk, potentially affecting a third or more of the world’s seaborne oil and gas. Still, serious economic analysis will require event‑study work that isolates shipping‑related shocks from other drivers—a task that remains only partially complete in the public domain.

Iran, great‑power involvement, and escalation risks

The Houthi role in the Red Sea is inseparable from the broader regional contest involving Iran, the United States, Saudi Arabia, and other actors, though the nature of that connection is often simplified in public debate. The Houthis are widely described as “Iran‑backed,” and there is substantial evidence of Iranian material, financial, and technical support, including assistance with missile and drone capabilities. At the same time, reliable reporting suggests the relationship is not as tightly controlled as Tehran’s ties to some other proxies: the Houthis maintain their own leadership structure and local agenda in Yemen, which includes bargaining power over Riyadh and domestic legitimacy among their supporters.

International responses have steadily escalated. The UN Security Council has formally demanded an end to Houthi attacks on Red Sea shipping, and Western navies have mounted patrols and, in some cases, direct strikes on launch sites and command nodes in Yemen. Saudi Arabia, seeking to protect both its Red Sea exports and fragile ceasefire understandings in Yemen, faces an uncomfortable choice between kinetic responses that risk reigniting the Yemen war and more indirect measures such as bolstering naval escorts and hardening energy infrastructure. For Washington and other capitals, the concern is that repeated maritime incidents could serve as tripwires for a broader confrontation with Iran, especially if attacks kill Western sailors or significantly damage allied naval vessels.

Blockade versus “threatened corridor”: what the evidence supports

Given the dramatic language in some coverage, it is useful to be precise about what has and has not been demonstrated. The documented record supports several firm conclusions. First, the Houthis have repeatedly and explicitly declared their intent to block or ban certain categories of shipping—Israeli, Saudi, and “enemy” vessels—from the Red Sea and Bab al‑Mandeb. Second, they have executed a sustained campaign of missile and drone attacks that has sunk ships, killed sailors, and forced a large share of global commercial traffic to reroute, with measurable impacts on freight costs and delivery times. Third, the corridor they threaten is objectively one of the most critical maritime chokepoints on the planet, magnifying the global stakes of what might otherwise be a regional skirmish.

Where the evidence is thinner is on two fronts. One is capacity: nothing in the public record suggests the Houthis can impose a classic, watertight naval blockade in the sense of physically interdicting all traffic over time. A significant volume of ships continues to transit under escort or at heightened readiness, and some reported “closures” have, on closer inspection, been partial or time‑limited. The other is economic attribution: while there is no doubt that Red Sea attacks have increased costs and risk premia, precise quantification of how much they alone moved oil prices or global inflation, as distinct from other shocks, remains an open analytical problem. Neither caveat negates the seriousness of the disruption; they simply mark the boundaries of what current evidence can sustain.

The insurance cost of shipping goods through the southern Red Sea doubled for some companies on Thursday, after Yemen's Iran-aligned Houthis attacked at least one tanker overnight, sources said.

On Thursday, the sources said, indicative war risk premiums for voyages through the…

— Giovanni Staunovo🛢 (@staunovo) July 23, 2026

What to watch: shipping behaviour, data, and political choices

Looking ahead, the most meaningful indicators of how deep this crisis runs will not be additional rhetoric from either the Houthis or their adversaries; it will be the hard behaviour of ships, insurers, and states. Automatic Identification System (AIS) data and port throughput statistics will show whether traffic through the Bab al‑Mandeb and Suez continues to languish or begins to recover as escorts expand and risk is reassessed. War‑risk insurance bulletins and freight indices will, in turn, reveal how markets price the residual danger and whether rerouting remains the norm or becomes an expensive exception.

On the political side, the key questions are whether Saudi Arabia and its partners can protect Red Sea exports without sliding back into full‑scale war in Yemen, and whether Iran chooses to treat Houthi maritime disruption as a pressure tool to be dialled up and down or as a permanent feature of its regional posture. For all the complexity, the underlying lesson is stark: in a world where vital energy and trade routes hinge on a few narrow straits, a determined insurgent movement with modern weapons and a strategic coastline can, at relatively low cost, impose global consequences.