Investing.com - The cost of chartering a supertanker on the Persian Gulf-to-China route hit $1.035 million per day, according to Baltic Exchange data, up from roughly $208,000 per day before the US-Israeli war with Iran began on February 28, a near-fivefold surge that is now transmitting through diesel prices, freight costs, and consumer goods worldwide.

Frontline Ltd. (NYSE: FRO), one of the world's largest publicly listed VLCC operators by fleet size, is the most direct equity expression of the tanker-rate shock, with its revenue tied directly to the spot charter market that is now pricing above $1 million per day. It should be noted that war-risk insurance premiums are typically layered on top of the Baltic Exchange day rate in conflict zones, though the precise surcharges applied in the current Hormuz environment have not been confirmed in available sources; investors modelling FRO's earnings at the headline $1.035 million rate may therefore be understating the all-in cost burden on charterers. Comparable rate beneficiaries in the listed tanker space include International Seaways (NYSE: INSW) and DHT Holdings (NYSE: DHT), which offer investors additional liquid exposure to the VLCC spot market. FRO shares have roughly doubled year-to-date, reflecting how fully the market has repriced the company's earnings power at current charter rates.

The underlying cause is a near-shutdown of Hormuz traffic. Only 17 commodity vessels transited the strait over the weekend of September 20-21, down from 37 a week earlier, per Kpler shipping analytics. Before the conflict, the strait handled roughly 125 large commercial vessels per day, meaning current transit volume has collapsed to a fraction of its pre-war baseline. Iran's Revolutionary Guard struck the Togo-flagged tanker Trend after the vessel attempted to navigate the strait without authorisation, AP News reported, and a second tanker was separately hit by an unknown projectile in the same period, further chilling operator appetite for the route.

Saudi Aramco is pressing ahead regardless, increasing exports through Hormuz after Houthi attacks on its East-West pipeline left the strait as its primary export artery. Reuters reported that 22 tankers, mostly VLCCs, carried 42 million barrels of crude out of the strait in the week of September 13, per Kpler data. That sustained demand for willing vessels, combined with extreme supply-side risk aversion, is what is sustaining rates at their historic highs.

The cost spiral does not stop at the waterline. US diesel prices hit an all-time high of $6.31 per gallon as of September 17, a nearly 69% increase from $3.69 a gallon a year earlier, according to AAA data cited by J.P. Morgan. A Bloomberg Opinion piece published Monday argues that tanker rates at these levels constitute a new and under-appreciated inflation shock, one that most forecasters have yet to fully price in because it transmits gradually through supply chains rather than appearing instantly at the pump. "Diesel is the price nobody watches until it's already inside everything else," Carmit Glik, CEO of Ship4wd, told CNBC. "It moves through freight rates, farm equipment, food delivery, and home heating, anything that touches a truck at some point in its journey." That transmission mechanism is why the Hormuz disruption carries an inflation dimension well beyond energy markets.

Against that backdrop, trading house Trafigura moved on Monday to capitalise directly on the rate environment, launching Volare Shipping as a dedicated VLCC arm. The new entity currently operates six VLCCs and has eight more newbuilds on order for delivery through 2028. Trafigura plans a $500 million private placement ahead of a listing on Euronext Growth Oslo on or about October 5. "The contemplated private placement will fully fund our current newbuilding programme," Alexandre Duff, Volare's CEO, said in a statement reported by Reuters. The IPO will be the first major tanker listing to capitalise explicitly on the $1 million-per-day rate environment, making it a live referendum on how long sophisticated capital expects the disruption to persist.

Market sentiment heading into Monday's NYSE open remains cautious. Hormuz talks are delayed, a key overhang for energy markets, according to Investing.com's markets briefing. European natural gas, meanwhile, is set to snap a five-week winning streak, reflecting some softening in regional energy sentiment even as the tanker disruption shows no sign of resolving.

Two near-term catalysts will define the next leg for shipping and energy markets. The Volare Shipping listing on Euronext Growth Oslo, targeted for around October 5, will reveal both investor pricing expectations for the rate cycle and the depth of institutional appetite for war-risk exposure; the IPO price range and anchor commitments have not yet been disclosed. Separately, any substantive progress in Hormuz diplomatic talks, currently stalled, would be the single largest downside risk to elevated tanker rates; a reopening of normal strait traffic, which before the war ran to roughly 125 vessels per day, could quickly unwind the scarcity premium that has pushed day rates to their current record.