Two companies can operate similar fleets, report similar revenue totals, and still see their stock prices move in completely opposite directions on the same news day. The reason, nearly always, is contract structure. Tanker companies earn revenue through two main contract types: spot market voyages and time charters. Understanding the difference between these structures is foundational to reading any tanker stock’s earnings report, dividend outlook, or rate sensitivity. This post explains both contract types and why the mix a company carries determines how much of any rate move actually reaches its shareholders.
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What a Spot Rate Is
A spot rate is the price a shipowner receives to carry a specific cargo from one port to another, agreed upon at or near the time the vessel loads. The rate is set in the open market. If crude tanker demand is high and vessel supply is thin, spot rates rise sharply. If too many ships are chasing too few cargoes, rates fall just as fast. Spot rates can double in a month and halve in the next quarter. That volatility is both the opportunity and the risk for investors in spot-heavy tanker stocks.
Spot voyages for crude tankers are typically priced using a worldscale (WS) system. Worldscale is a percentage of a published flat rate per ton that the Baltic Exchange maintains for each standard route. A rate of WS 100 means the shipowner earns exactly the published flat rate. WS 200 means double that rate. VLCC (very large crude carrier) rates on the TD3C route, which measures a standard cargo from the Middle East Gulf to China, are quoted in both worldscale and dollars per day. When a headline says VLCC rates hit 80,000 dollars per day, that is a spot rate quote. You can see how VLCC spot rates are moving right now in the VLCC rate analysis published today.
For product tankers, rates are typically quoted in dollars per metric ton or as a worldscale percentage on specific routes. The Baltic Clean Tanker Index (BCTI) aggregates spot rate movements across the main product tanker routes and vessel sizes. A rising BCTI means spot market product tanker earnings are improving across the board. A falling BCTI means the opposite.
The earnings figure tanker companies actually report is the time charter equivalent (TCE) rate. TCE converts spot voyage revenue into a per-day figure by subtracting voyage costs, primarily fuel and port fees, and dividing by the number of revenue-earning days in the reporting period. TCE makes it possible to compare earnings across different voyage lengths and cargo sizes on a consistent basis. It is the most important single number in a tanker earnings report. Without it, comparing a 30-day VLCC voyage to a 10-day MR tanker cargo run is impossible to do on the same scale.
TCE is the only metric that lets you compare a 30-day VLCC voyage and a 10-day MR cargo run on the same scale. Without it, tanker earnings are impossible to benchmark across companies or time periods.
What a Time Charter Is
A time charter (TC) is a fixed-rate contract in which a charterer hires an entire vessel for a defined period, typically six months to five years. The shipowner receives a fixed daily payment regardless of where spot rates move during the contract term. The charterer pays fuel costs and port expenses. The owner covers crew costs, maintenance, and insurance. The fixed daily rate is known at the start and does not change when market conditions shift.
Time charters provide predictable cash flow. A shipowner with a large portion of the fleet on time charters knows exactly what revenue is coming in for the next 12 or 24 months. That predictability supports dividend planning. Companies with high TC coverage can pay steadier dividends because earnings are not tied to weekly spot market fluctuations. That profile makes them look more like income instruments than pure rate plays.
The trade-off is upside capture. If spot rates rise well above a TC rate during the contract period, the shipowner earns the TC rate, not the spot rate. The charterer captures the upside because they control the vessel and generate profits on the cargoes they carry at current market rates. When the tanker market ran to historic highs in 2023 and 2024, shipowners with large TC books reported steadier earnings than their spot-exposed peers but underperformed in raw earnings during the strongest rate windows.
Spot Versus Time Charter: The Investor Implication
For tanker stock investors, the question is not which structure is better in absolute terms. The question is which structure fits your view of where rates are going.
A high spot exposure company gives you direct market leverage. If product tanker rates rise 30 percent next quarter, a company running most of its fleet in the spot market will report an earnings increase close to that 30 percent. Variable dividend payments from a spot-exposed tanker company move in the same direction as the rate index. The stock typically moves in the direction of rate expectations before the earnings report confirms the move. DHT Holdings, for example, runs a nearly fully spot-exposed VLCC fleet. When VLCC rates move, DHT earnings move with them, almost dollar for dollar on a per-vessel basis.
A high TC coverage company gives you earnings visibility. Even if rates fall 30 percent next quarter, the TC fleet earns the same fixed daily rate. Dividend payments may hold steady. The stock may hold value better than its spot-exposed peers during a rate decline. But when rates recover, the TC-heavy company lags in earnings recovery until those fixed contracts expire and the fleet rolls back into the spot market at higher rates.
Most tanker companies operate a blend. A company might run 60 percent of its fleet on spot and 40 percent on time charters. That blend gives partial rate participation on both the upside and the downside. Management teams adjust the blend based on their rate outlook. If they expect rates to fall, they lock more vessels into time charters at current levels. If they expect rates to rise, they keep vessels in the spot market and resist locking in low fixed rates.
How to Read TC Coverage in an Earnings Report
Every publicly traded tanker company discloses its forward charter coverage in each quarterly earnings report. The disclosure typically shows, for each vessel class, the percentage of available vessel days already contracted under time charters, the average TC rate for those contracted days, and how many quarters forward the coverage extends.
The coverage percentage tells you how much of the upcoming quarter’s earnings are locked in. If a company discloses 40 percent TC coverage at 28,000 dollars per day for the next quarter, you know that 40 percent of earnings are fixed at that rate. The remaining 60 percent will earn whatever the spot market pays during the quarter. Add those two figures together, weighted by their percentages, and you get a rough estimate of the blended TCE the fleet should report at quarter end.
Coverage rates relative to current spot market levels also signal management confidence. If a company is signing new time charters at 25,000 dollars per day when the spot market is trading at 35,000, management is either hedging downside risk or does not believe spot rates will hold at that level. If management refuses new TC offers and keeps vessels open to spot, they believe rates will stay strong or move higher.
A company’s TC coverage percentage is a management team’s public bet on where rates are going. High coverage before a rate collapse looks brilliant. High coverage before a rate spike looks like leaving money on the table.
Why This Matters for the TXZEN Watchlist
Across the TXZEN watchlist, the TC versus spot mix varies significantly from company to company. Companies like DHT Holdings and Frontline (FRO) run predominantly spot-exposed VLCC fleets. Their earnings move sharply with VLCC rate headlines. Hafnia (HAFN) and Scorpio Tankers (STNG) run large product tanker fleets with varying TC coverage each quarter depending on management’s market view. International Seaways (INSW) blends crude and product tanker exposure across multiple vessel classes, giving it a naturally mixed contract profile.
When reading any quarterly earnings report or analyst update for these names, look for the TC coverage table before evaluating the headline earnings number. That table tells you how much of the reported earnings was guaranteed before the quarter started and how much was earned in the open market. It is the fastest way to assess whether the company outperformed or underperformed the rate environment it sailed through. You can see how the full group currently stacks up on valuation in the Tanker Stocks P/NAV Scorecard.
For investors comparing two tanker stocks with similar fleet sizes, the TC versus spot breakdown often explains more than any other single factor why one stock outperformed the other in a given quarter. A company that earned 45,000 dollars per day TCE in a quarter where spot rates averaged 50,000 almost certainly has significant TC coverage at lower rates. A company that earned 52,000 in the same quarter was running mostly spot. Once you know which is which, the earnings comparison makes immediate sense.
Contract structure does not make a tanker stock a buy or a sell on its own. But it determines how directly any rate move translates into earnings. Get that structure right in your analysis and the rest of the earnings math follows cleanly. Miss it and you will be perpetually confused about why two tanker companies with similar fleets reported such different numbers in the same rate environment.