The Real Catalyst for Rising Crude Oil Prices is Not the Price Itself — Market Anxiety Over Depleting Offshore Inventories

What holds significant weight in the current oil market is not the price itself but the fact that "floating inventories at sea" are diminishing. This was precisely the focus of the source article. As the supply constraints from the Persian Gulf enter their third week, the buffer of maritime inventories is rapidly being depleted, forcing buyers to seek alternative procurement that is not merely a stopgap. What the market fears is not a simple binary of having enough or not, but rather the loss of time to withstand when shortages occur.

In the March report by the International Energy Agency (IEA), it was noted that nearly 20 million barrels per day of crude oil and petroleum product exports from the Gulf have been effectively curtailed due to the war, positioning inventories as a "welcome buffer to soften the immediate supply loss." Simultaneously, in Asia, refiners, industrial consumers, and end-users are already feeling the impact, while Europe, the Americas, and Africa are only delayed in experiencing the effects due to longer shipping times, with shortages expected to eventually spread.

The data on inventories at sea and on land vividly illustrate this situation. According to the IEA, as of March 11, 238 oil tankers loaded with cargo were stalled in the Gulf, holding a total of 186 million barrels of crude oil. Furthermore, at the end of February, there were 487 million barrels of "sanctioned oil at sea" globally, while OECD industrial inventories stood at 2.82 billion barrels at the end of January, equivalent to 62.1 days of forward demand. While the numbers suggest there are still inventories, the issue lies in whether these inventories can reach "the necessary locations at the necessary speed."

In reality, distortions such as "it's available but too expensive" and "it's not reaching the desired locations" are already spreading on the ground in Asia. Reuters reported in early March that a trader in Singapore testified, "Everyone is looking for oil for the latter half of March. Tankers are too expensive, and arbitrage for Singapore is closed." Even if sources like the United States, Mexico, or potentially Venezuela are considered, the volume is insufficient. Having inventories at sea and having usable inventories are separate issues.

Emerging as a desperate measure is the return of sanctioned oil to the market. U.S. Treasury Secretary Scott Bessent stated that the U.S. might soon consider lifting sanctions on approximately 140 million barrels of Iranian oil stranded at sea, suggesting it could alleviate price pressure for 10 to 14 days. However, in the same statement, he explained that the supply deficit due to the closure of the Strait of Hormuz is on the order of 10 to 14 million barrels per day. Thus, even though 140 million barrels may seem substantial, from the perspective of the lost flow, it only buys "a brief respite."

Consequently, buyers are rushing to other barrels at sea. In India, the acceptance of Russian crude oil floating offshore has been expedited, with Reuters reporting that approximately 9.5 million barrels could arrive off the coast of India within weeks. Additionally, data from Kpler indicates that around 30 million barrels of Russian crude remain loaded in the Indian Ocean, Arabian Sea, and Singapore Strait. Furthermore, Russian fuel oil imports to Asia in March are expected to exceed 3 million tons, equivalent to approximately 614,500 barrels per day, with Singapore and Malaysia being the primary recipients. Nonetheless, analysts believe that if the crisis persists, the gap in Middle Eastern supply will not be filled.

These supply-demand distortions naturally reflect in prices. According to Reuters, Brent crude temporarily exceeded $119 on March 19 following an attack on energy facilities by Iran. Another Reuters article noted that crude oil prices rose by more than 40% in March alone, leading major institutions like Bank of America and Standard Chartered to revise their forecasts upward. Goldman Sachs has labeled the shock concerning Hormuz as "one of the largest supply shocks in the past 50 years," warning that if the flow recovery is delayed, prices above $100 could persist.

Nevertheless, countries are not standing idly by. On March 11, IEA member countries agreed to release a record 400 million barrels from strategic reserves. However, Reuters reported that even this 400 million barrels only corresponds to about 20 days of supply loss concerning Hormuz, and it could take weeks to months to reach the market. Moreover, on March 20, the IEA proposed demand reduction measures such as working from home, speed limits, alternative transportation use, and avoiding non-essential air travel. This implicitly acknowledges that releasing reserves alone is insufficient to navigate the crisis.

Public reactions on social media reflect this sentiment of "isn't this just a drop in the bucket?" On Reddit's investment community, there is a noticeable concern that even partial disruptions in the Strait of Hormuz could quickly lead to inflation in energy prices, resulting in a stagflation scenario where growth slows and prices rise simultaneously. On Facebook, comments on Reuters' posts highlight that since gasoline affects the transportation costs of all goods, an oil shock would impact the entire cost of living. The prevailing sentiment on social media is not so much surprise at the high oil prices themselves, but rather a tangible anxiety about "how it will ultimately affect my living expenses."

On the other hand, posts pointing out the limitations of reserve releases with numerical evidence are also spreading. On Reddit's oil forum, a calculation post stating, "The IEA's release of 400 million barrels is nowhere near enough compared to the amount that flowed through Hormuz during normal times," has garnered attention. The post shared the view that the release amount is merely a short-term measure and that if the strait's functionality does not return, the problem will only be postponed. The fact that a simple calculation by an individual is gaining support over analyses from market professionals is evidence of the strong distrust.

What's even more intriguing is that the sentiment is not entirely pessimistic. On Reddit, while posts sarcastically revisiting predictions made the day before the war that "long-term supply disruptions are not anticipated" are popular, there are also contrarian views suggesting, "It might end next week, and oil prices could plummet." This indicates that in the realm of social media, there is a coexistence of ridicule towards experts who underestimated the supply disruption and optimism betting on a short-term resolution. The essence of the market lies not only in the collapse of supply and demand but also in the divided outlook itself.

It is risky to dismiss the current rise in oil prices as merely an addition of geopolitical risk. The buffer of floating inventories is decreasing, transportation costs for alternative procurement sources are rising, and releasing reserves takes time. Moreover, in financial markets, there is growing suspicion that this might trigger a simultaneous resurgence of inflation and economic slowdown. While floating inventories at sea still exist in numerical terms, what the market is truly observing is whether these inventories still have the "time" to buy reassurance for the next week or month. The oil market is now beginning to shift from a crisis of price to a crisis of reprieve.

Source URL

Financial Post
https://financialpost.com/pmn/business-pmn/oil-markets-seaborne-buffer-runs-down-fast-as-iran-war-drags-on

Original Bloomberg article with the same title (The main theme of the text is that the "buffer of floating inventories" is rapidly decreasing)
https://www.bloomberg.com/news/articles/2026-03-20/oil-market-s-seaborne-buffer-runs-down-fast-as-iran-war-drags-on

IEA Oil Market Report March 12, 2026 edition (Number of tankers stalled in the Gulf, maritime inventories, OECD inventories, supply-demand impact of Hormuz Strait disruptions)
https://iea.blob.core.windows.net/assets/a25ddf53-cd6c-4910-ac90-16bfd28399e7/-12MAR2026_OilMarketReport.pdf

Reuters (Field testimony that fuel oil procurement difficulties are intensifying in Asia, and arbitrage for Singapore is closed)
https://www.reuters.com/business/energy/asia-struggles-find-fuel-oil-middle-east-exports-plummet-sources-say-2026-03-06/

Reuters (Emergency response measure considering the U.S. lifting sanctions on approximately 140 million barrels of Iranian oil stranded at sea)
https://www.reuters.com/business/energy/us-may-remove-sanctions-iranian-oil-stranded-tankers-bessent-says-2026-03-19/

Reuters (The argument that even if Russian fuel oil flows into Asia, it cannot completely fill the gap in Middle Eastern supply)
https://www.reuters.com/business/energy/asias-russian-fuel-imports-poised-hit-all-time-high-due-middle-east-disruption-2026-03-19/

Reuters (The movement to utilize Russian crude oil floating offshore around India and the Singapore Strait)
https://www.reuters.com/business/energy/indian-refiners-tap-russian-oil-floating-offshore-sources-say-2026-03-05/

Reuters (Brent temporarily exceeded $119, with Goldman warning of upside risks in terms of price factors)
https://www.reuters.com/business/energy/goldman-sachs-flags-upside-risks-oil-prices-near-term-into-2027-2026-03-19/

Reuters (March crude oil price increase rate, the proportion of global supply passing through the Strait of Hormuz, revisions of major financial institutions' forecasts)
https://www.reuters.com/business/energy/analysts-reassess-oil-price-estimates-iran-conflict-disrupts-markets-2026-03-13/

Reuters (Explanation of the IEA's release of 400 million barrels and its limitations)
https://www.reuters.com/business/energy/iea-proposes-largest-ever-oil-release-strategic-reserves-wsj-reports-2026-03-11/

Reuters (Article indicating that even demand reduction measures such as working from home and avoiding air travel were proposed)
https://www.reuters.com/business/energy/work-home-avoid-air-travel-deal-with-higher-energy-prices-iea-says-2026-03-20/

Reddit / r/investing (SNS reaction: Posts with strong stagflation concerns)
https://www.reddit.com/r/investing/comments/1rw9m88/how_big_of_a_deal_is_the_strait_of_hormuz/

Reddit / r/oil (SNS reaction: Calculation posts stating that the IEA's release of 400 million barrels is insufficient)
https://www.reddit.com/r/oil/comments/1rrlaex/i_did_the_math_on_the_ieas_400_million_barrel/

Reddit / r/oil (SNS reaction: Posts mixing sarcasm towards predictions that underestimated supply disruptions and counterarguments expecting short-term resolution)
https://www.reddit.com/r/oil/comments/1ruczqn/we_do_not_anticipate_protracted_oil_supply/