Explainer · Energy

JKM–TTF parity, explained

Why the Asian gas premium existed, and why it has nearly closed

Written 31 May 2026 · All explainers

The two prices

JKM is the Japan-Korea Marker: the S&P Global Platts benchmark price for spot cargoes of liquefied natural gas (LNG) delivered into Northeast Asia — Japan, Korea, China, Taiwan. It is quoted in US dollars per million British thermal units ($/MMBtu), the unit the gas trade uses for energy content.

TTF is the Title Transfer Facility: the Dutch virtual trading hub whose price is the European benchmark for natural gas. It is quoted in euros per megawatt-hour, but the trade converts it to $/MMBtu so the two benchmarks can be read side by side.

The spread is JKM minus TTF: how much more (or less) a unit of gas fetches in Asia than in Europe.

Why Asia used to pay more

For most of the LNG market’s history JKM sat above TTF by a structural margin — the “Asian premium”. Three reasons, all about alternatives:

  1. Asian buyers had no pipeline. Japan, Korea and Taiwan are islands or effectively so; gas arrives by ship or not at all. Europe, by contrast, had pipeline gas from Russia, Norway and Algeria as a substitute, which capped what it would pay for a cargo.
  2. Shipping cost more. A cargo loaded in the Atlantic basin — the US Gulf Coast, West Africa — takes longer and costs more to deliver to Tokyo than to Rotterdam.
  3. Winter without storage. Northeast Asia has cold winters and little large-scale gas storage, so seasonal demand spikes hit the spot price directly. Europe’s storage smoothed the same swing.

The premium is what made basin arbitrage a business. A trader holding a cargo at Sabine Pass in Louisiana could sell it into either market and would pick whichever paid more. The profit was the spread minus the extra cost of sailing to Asia. When JKM stood $5/MMBtu above TTF, redirecting a single cargo — roughly 70,000 tonnes — was worth tens of millions of dollars. At $1, the same voyage barely covered the cost of changing course.

One cargo, two destinations: how the JKM–TTF spread paid for basin arbitrage A cargo loaded on the US Gulf Coast can sail to Rotterdam, priced off TTF, or to Tokyo, priced off JKM. Then: JKM sat about five dollars above TTF and the detour to Asia was worth tens of millions per cargo. Now: the two prices sit within about a dollar and the same voyage barely covers the cost of rerouting. Levels are illustrative. Basin arbitrage · one cargo, two markets LNG cargo · ~70,000 t loaded, US Gulf Coast Rotterdam · priced off TTF Europe · pipeline gas as the alternative Tokyo · priced off JKM Northeast Asia · no pipeline, little storage Then · the Asian premium TTF JKM ≈ $5 /MMBtu Rerouting one cargo: tens of millions of dollars. Now · near-parity TTF JKM ≈ $1 /MMBtu Same voyage: barely covers the cost of changing course. price correlation 0.955 in 2025 (IEA)
Figure 1. One cargo, two markets. The profit from sailing to Asia rather than Europe was the JKM–TTF spread minus the extra shipping cost. The $5 and $1 levels are illustrative round numbers for the mechanism, not a price series.

What “near-parity” means

Near-parity is the state in which the two benchmarks trade at roughly the same level, so the spread — and the arbitrage that lived in it — shrinks towards nothing.

That is what happened. The International Energy Agency’s Q1-2026 Gas Market Report records that “the correlation between European and Asian benchmark prices rose to a new all-time high of 0.955 in 2025” — a correlation of 1.0 would mean the two prices moved in perfect lockstep. The IEA attributes it to the growing share of destination-flexible LNG supply. [D — IEA, see source below]

Three structural drivers pushed the prices together:

  • More cargoes can go anywhere. US LNG is sold on terms that let the buyer send it to any destination. As those flexible volumes grew alongside Qatar’s older, destination-restricted Asian contracts, more of the world’s supply became free to chase the higher price — which is exactly the mechanism that closes a price gap.
  • Europe became a permanent LNG buyer. After Russian pipeline gas was displaced in 2022, Europe stopped being the market of last resort for spare cargoes and became a continuous competitor with Asia for the same ships.
  • The Asian benchmark grew up. As JKM matured into a liquid, transparent index, traders began treating it the way they treat TTF, and the two markets started to price against each other directly.

What convergence takes away

The loser is the business built on the gap. Portfolio players — the large LNG traders and utilities that hold flexible supply and a fleet of ships — earn a meaningful part of their trading income by physically routing cargoes between basins to capture the spread. At a $5 spread, that is a large and repeatable profit line. At $1, the same activity is a marginal logistics decision.

So if near-parity persists, the standalone trading income of any basin-arbitrage business is structurally smaller than the 2022–2024 period implied — a real, quantifiable haircut to a story that those years made look permanent. The physical business of moving gas continues; the windfall from where it goes does not. [S — our reading of the mechanism; the premium can reopen in any winter that catches Asia short]

Caveats

  • Correlation is not the same as a zero spread. Two prices can move together and still sit apart; the IEA figure says they move together, and the narrowing of the level is the trade’s own observation over 2025, not a number the IEA states in the passage cited.
  • The $5 and $1 spreads are illustrative round numbers for the mechanism, not a series.
  • The premium is structural in origin but seasonal in behaviour. A cold Asian winter with low inventories can reopen it quickly; convergence is the base case, not a law.

Source [D]