16:11 · 21 July 2026

Red Sea, but not the indices : The effects of the Bab al-Mandab blockade.

One of the main organizations that are part of Iran’s so-called “axis of resistance” against the United States and Israel in the Middle East announced earlier this week that it is resuming the blockade of Saudi Arabia, allegedly in response to increased U.S. activity in the region after the ceasefire between Iran and the United States collapsed.

Neither equity indices nor energy commodity prices, however, seem to be paying much attention to this. Why?

Two questions need to be asked:

  • How REALLY important was shipping through the Red Sea area, especially for the oil market, specifically in the context of the conflict with Iran?
  • Only after knowing the answer to that question can we use it as a starting point to understand the current price dynamics (mainly) in oil.

We need to start by going back to 2023, when the Houthis were able for the first time to seriously disrupt shipping in the Red Sea. The actions of the Gulf states and the coalition led by the United States significantly degraded their ability to attack infrastructure and vessels in the region. Given Iran’s difficult situation, the tight blockade and embargo imposed on both countries limit their ability to replenish weapons stockpiles.

However, the marginalization of the Houthis themselves is only one piece of the puzzle. Despite the reduced danger, many shipowners still avoid the region.

Daily ship transit: Suez and Bab al-Mandab

 
 

The peak of cargo traffic through the strait occurred in 2023. Since then, it has gradually but clearly declined. Today, the number of ships crossing both chokepoints each day is a little more than half of the late-2023 peak. This means that the threat from the Houthis has been priced in and has been visible on freight maps not since yesterday and not since the beginning of the year, but for more than two years already.

Not all ships are made equal 

Not every cargo ship is a container ship. Right now the market is watching oil prices with concern, so analysts and investors need to focus on supertankers. Here the situation is more complex.

According to data including from SCNT, Reuters, and the EIA, although the number of ships has fallen at both exits from the Red Sea basin, the volume of oil transported in the region has increased markedly, primarily in the Bab al-Mandab Strait, where the increase is about 40%. In light of this, a blockade of the strait should clearly push prices up, right?

Oil transit volume: Bab al-Mandab

 

The missing element in the pricing equation is scale and context. A 40% increase today means a level of 7.5 million barrels per day, which is just under 7% of daily global demand. If the Bab al-Mandab Strait were completely closed tomorrow, it would not mean cutting off 25%, 15%, or even 10% of global oil transport volume. It would be only about 7%.
A complete closure is also unlikely due to the Houthis’ fading ability to conduct attacks in the region. In addition, unlike the Persian Gulf, the Red Sea has two exits rather than one.

It will get worse before it gets better

So can we conclude in this context that “everything will be fine”? Unfortunately not. In a sense, the Bab al-Mandab Strait is a “prototype” for the status quo the United States seems to be pursuing in the Persian Gulf, namely using sanctions and airstrikes to reduce Iran’s ability to attack to such an extent that transit through the Strait of Hormuz becomes a level of risk acceptable to shipowners. Can this work?

By analyzing the current situation in the strait, we can gather a set of observations and draw conclusions from them:

  • The United States has clearly expanded the scale and nature of attacks on Iran. It is no longer only air power and naval forces being used, but increasingly also ground-based launchers.
  • Targets now include not only IRGC facilities but also those of Iran’s regular army.
  • Particular attention should also be paid to attacks on bridges, roads, and tunnels in southern Iran. Cutting off the ports in Bandar-e Abbas from the rest of the country is easy for the United States, but it implies the U.S. is prepared to keep escalating gradually. This can even be seen as preparation for seizing islands in the Persian Gulf.
  • Worst of all, Iran allegedly attacked water desalination facilities in Kuwait. This information suggests Iran feels an existential threat and may choose the most radical step: attempting to disable the water infrastructure of other states in the Persian Gulf.

Even from these fragmentary pieces of information, one can infer that the United States is likely planning a significant escalation, which will have short- and medium-term implications for valuations, not only for oil but, to a limited extent, also for equity indices.

OIL (D1)

 

Source: xStation5

In the long term, however, Iran does not seem to have any chance of achieving its maximalist demands, and the country’s economic situation has been deteriorating for months from “terrible” to “catastrophic.” The market knows this, and given all the mitigation measures taken by market participants, one should not expect a breakout above previous highs or major increases in expectations for hydrocarbon prices in the long run.

Kamil Szczepański - Financial Market Analyst at XTB

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