Hormuz Blockade and Refinery Attrition Drive Oil Higher as Fed Hike Odds Surge

The signal that matters most is not the headline strike count — it is the collapse of tanker traffic through the Strait of Hormuz to a two-month low, the simultaneous attrition of Russian refining capacity to 40% below prewar levels, and the quiet leap in Fed rate-hike odds from 34% to 46.5% in a single session. Three indicators that rarely move together all moved hard on the same day. That convergence is the anomaly worth watching.

The Strait of Hormuz: Blockade, Toll, and a Traffic Collapse

The United States carried out its fifth wave of strikes against Iran in six days on Sunday, July 13, hitting dozens of targets with precision munitions, according to US Central Command (CENTCOM){{cite:a5353e3bf8a7}}. The strikes came after Iran attacked a Cyprus-flagged container ship, the MV GFS Galaxy, transiting the strait — the latest in a series of attacks on commercial vessels that has progressively choked the waterway.

Iran responded by launching missile and drone attacks against the United Arab Emirates, Qatar, Kuwait, Oman, and Bahrain{{cite:a5353e3bf8a7}}. The Islamic Revolutionary Guard Corps (IRGC) also claimed it stopped two ships overnight by shutting down their systems, and Iran’s Persian Gulf Strait Authority reiterated that vessels using unauthorized routes would “not be covered by safe passage guarantees”{{cite:ae95391534d3}}.

The market tell is in the traffic data. Only six vessels transited the strait on Sunday, the lowest daily number in five weeks, down from 18–22 daily crossings earlier in July and roughly 130 per day before the conflict began on February 28{{cite:a5353e3bf8a7}}{{cite:ae95391534d3}}. Oil and gas tanker traffic fell to its lowest level since May 25, according to Kpler analysis{{cite:ae95391534d3}}. An increasing number of vessels are switching off AIS transponders, making the true count even harder to verify.

President Donald Trump then announced the US would reinstate its naval blockade of Iranian ships and impose a 20% reimbursement fee on all other cargo shipped through the strait, declaring the US “the guardian of the Hormuz strait”{{cite:ae95391534d3}}. The US military later clarified that the blockade would take effect on Tuesday, July 14 at 4:00 p.m. Eastern Time{{cite:cc492404f282}}. The White House has not detailed how the toll would be administered or whether Gulf allies have been consulted.

This re-escalation effectively tears up the interim memorandum of understanding signed on June 17, which had briefly reopened the strait and brought oil back toward pre-conflict levels. As IG analyst Fabien Yip noted, “Oil’s return towards pre-war levels in June reflected markets pricing in a best-case outcome for the fragile US-Iran arrangement; last week’s re-escalation exposes how fragile that assumption was”{{cite:a5353e3bf8a7}}.

The Second Front: Ukraine’s Refinery Campaign

Layered on top of the Hormuz crisis is a second energy-supply shock that has been building quietly for months. Ukraine’s sustained drone campaign has methodically dismantled Russian refining capacity, striking the most sophisticated units — hydrocrackers, reformers, and fluid catalytic crackers — that take months to repair and require parts Russia cannot easily source under sanctions{{cite:21c26c38012e}}.

On July 6, Ukrainian drones reached the Omsk refinery in southern Siberia — Russia’s largest — in a 2,500-kilometer strike. Additional strikes hit Rosneft’s Saratov refinery, the Taneco complex in Tatarstan, and the Ilsky refinery in the Krasnodar region on July 8–10{{cite:70a220dae259}}{{cite:21c26c38012e}}. July refining output is now more than 40% below prewar levels, and petrol shortages have reached approximately 35% of demand, spreading to Moscow and St. Petersburg{{cite:21c26c38012e}}.

Russia has banned diesel exports. Before the 2022 invasion, it exported more than one million barrels per day of diesel — crucial for trucks, construction, and farm machinery{{cite:21c26c38012e}}. The ripple effects extend well beyond Russia’s borders: European refining margins for diesel have jumped to a record $60.17 per barrel, and landlocked nations from Tajikistan to Mongolia that source discounted Russian fuel are facing shortages{{cite:21c26c38012e}}.

This is the quiet indicator most investors are not pricing: two simultaneous supply shocks — one at the chokepoint for one-fifth of global oil trade, the other systematically eroding the world’s second-largest refined-products exporter — are converging at a moment when global inventories have already been depleted.

Market Reaction: Oil Surges, Stocks Split, Rate-Hike Odds Jump

Brent crude rose more than 4% on Monday, with September futures reaching $78.82 a barrel — the highest since June 22{{cite:a5353e3bf8a7}}. WTI climbed roughly 3% to $73.83, briefly touching $75.08 overnight{{cite:e78b0f60a670}}. Oil prices are now approximately 9% higher than before the US and Israel launched their initial strikes on Iran in late February{{cite:a5353e3bf8a7}}.

Energy equities surged in lockstep. ExxonMobil (XOM) closed up 4.1% at $144.51, Chevron (CVX) rose 3.3% to $182.21, and ConocoPhillips (COP) gained 3.5% to $112.85 as of the July 13 close{{cite:53f1e3d3cba3}}. The United States Oil Fund (USO) jumped 8.4% to $117.79{{cite:53f1e3d3cba3}}. European oil equities also advanced, with the STOXX Europe 600 Oil & Gas index outperforming the broader market{{cite:b6629f134e6b}}.

Broader equities were mixed. The S&P 500 and Nasdaq Composite closed lower, with semiconductor and memory stocks — including Nvidia (NVDA), Micron (MU), and SanDisk (SNDK) — leading losses{{cite:cc492404f282}}. The Dow Jones Industrial Average bucked the trend, opening higher by approximately 122 points{{cite:e78b0f60a670}}. Major Asian markets fell sharply: Japan’s Nikkei 225 closed nearly 2% lower, while South Korea’s Kospi plunged 9%{{cite:a5353e3bf8a7}}.

The most consequential market move was in rate expectations. CME’s FedWatch tool now prices a 46.5% chance of a 25-basis-point hike at the July 29 FOMC meeting, up from 34% on Sunday{{cite:c6a043665362}}. On Kalshi, the probability jumped from under 20% to 36%{{cite:c6a043665362}}. The shift was driven by both the oil shock and Federal Reserve Governor Christopher Waller’s warning that the Fed “must not repeat the mistakes of 2021 and 2022,” when it waited too long to raise rates{{cite:c6a043665362}}.

The Fed’s Dilemma: CPI Tomorrow, Warsh’s First Testimony

The timing compounds the pressure. June CPI data lands Tuesday morning, with economists surveyed by Dow Jones expecting annual inflation of 3.8%, down from 4.2% in May{{cite:c6a043665362}}. Fed Chair Kevin Warsh — appointed earlier in 2026 — delivers his first monetary policy testimony before Congress on the same day{{cite:e78b0f60a670}}.

Goldman Sachs chief US economist David Mericle wrote that factors including the potential winding down of the war, declining tariff effects, and “mismeasured and overstated” AI demand should be enough to keep the Fed on hold — but this “leaves little margin for error”{{cite:ec83f716d56a}}. If the conflict re-escalates oil to $100 per barrel, Goldman’s modeling suggests monthly core inflation could be boosted by 3 to 4 basis points on top of the current 4.2% reading{{cite:ec83f716d56a}}.

Barclays global chairman of research Ajay Rajadhyaksha made a more hawkish case on Monday, arguing that the pass-through of higher prices from the oil shock “still isn’t over” and that the lack of demand destruction from elevated energy prices has exacerbated inflation{{cite:c6a043665362}}. He added that AI-induced price hikes are also deteriorating the inflation outlook, concluding: “A data-dependent framework means you respond to inflation prints, as well as forecasts. And the prints, for the next few months, are not going to look good”{{cite:c6a043665362}}.

Goldman’s commodity team struck a longer-term note, estimating that enough pipeline capacity will be added in the Middle East to insulate over 45% of Persian Gulf producers’ pre-war exports from Hormuz shocks by end-2027, and more than 60% by end-2028{{cite:ec83f716d56a}}. But that is a multi-year structural story. The acute risk is here and now.

The Convergence Pattern

What makes this moment unusual is the simultaneity. Hormuz tanker traffic at a two-month low and Russian refining at 40% below prewar levels are not independent risks — they are compounding. The strait normally handles one-fifth of global oil trade. Russia was the world’s second-largest refined-products exporter. Both supply chains are degraded at the same time, with global inventories already drawn down from months of conflict.

Ship broker Gibson captured the downside scenario plainly: “Should the renewed escalation in the strait lead to another prolonged closure of Hormuz, the world will find itself in a much tougher spot. With global inventories rapidly depleted in recent months, this is a recipe for much tighter supply, higher prices and significant downside risk for tanker markets”{{cite:ae95391534d3}}.

One shipping industry source framed the current state as a “managed conflict, similar to the Houthis in the Red Sea” — referring to the Yemeni militia that paralysed Bab al-Mandeb traffic for nearly two years before a 2026 ceasefire{{cite:ae95391534d3}}. If Hormuz settles into that pattern — chronic low-grade disruption rather than a clean closure or a clean reopening — the oil risk premium becomes structural rather than transient, and the Fed’s margin for error narrows further.

What to Watch Next

• Tuesday, July 14, 4:00 p.m. ET: The US naval blockade of Iranian ships is scheduled to take effect. Whether it is enforced aggressively or remains declarative will set the near-term escalation trajectory.
• June CPI report (Tuesday morning): Economists expect 3.8% annual inflation, down from 4.2%. A downside surprise would ease the hike pressure; an upside surprise, combined with the oil move, could push FedWatch odds above 50%.
• Fed Chair Warsh’s first congressional testimony (Tuesday): His tone on supply shocks and inflation persistence will be parsed for whether the Fed is moving from “on hold” to “leaning hawkish.”
• Hormuz tanker traffic counts: Watch for whether daily transits stabilize in the single digits or recover toward the 18–22 range seen earlier in July. Continued single-digit traffic would confirm a structural disruption, not a one-off.
• Ukraine’s strike tempo on Russian refineries: The race between Russian repair crews and Ukrainian drone cadence will determine whether the 40% refining shortfall deepens or plateaus. Watch for new strikes on plants not yet hit, such as Ukhtinsk in far northern Russia.
• OPEC+ output decisions: Any response to the dual supply shock — quota expansion or restraint — will modulate the price ceiling.
• Q2 earnings season (this week): Goldman Sachs (GS), JPMorgan Chase (JPM), and BlackRock (BLK) report Tuesday morning. S&P 500 earnings are expected to grow 23.7% year-over-year{{cite:e78b0f60a670}}. Whether energy-sector tailwinds and rate-hike headwinds are already reflected in guidance will shape the next leg of the market.

The base case is still a managed, chronic disruption — not a full Hormuz closure. But the pattern of escalation is accelerating, and the indicators that precede a break — traffic collapse, refinery attrition, rate-hike odds — are all flashing in the same direction. The question is whether the June CPI print and Warsh’s testimony on Tuesday confirm or interrupt that trajectory.