Greece: Vertical Corridor Gets a Commercial Lifeline

What happened: A deal between five TSOs and the European Commission cuts Vertical Corridor transit tariffs by up to 37% and introduces longer-term capacity products, directly addressing the structural causes of four consecutive failed auctions.

Why it matters: US pressure at CERAWeek, where the Greek delegation lobbied hard in Houston, helped get both Brussels and reluctant EU member states on board.

What happens next: The commercial test comes in July. We believe the regulatory fix is necessary but not sufficient — long-term LNG supply contracts from Eastern European buyers remain the missing ingredient.

Four Failures, One Deal

The Vertical Corridor has been kept alive by political will despite a disappointing commercial record: three of four capacity auctions attracted no bids, and the most recent round closed without a single binding offer. Tariff discounts by operators drew a competition probe from Brussels rather than commercial traction.

The 27 March agreement between the transmission system operators of Greece, Bulgaria, Romania, Moldova and Ukraine, with Commission sign-off, cuts tariffs along the Greece-Ukraine axis by roughly a third, depending on entry point. It also introduces quarterly and annual capacity products alongside daily and monthly options. The new framework is fully EU-compliant, putting the reductions on a legal footing and removing the objections that had dogged previous discount attempts.

Heavy Lifting in Houston

The timing of the deal — days after CERAWeek — is not coincidental. Energy Minister Stavros Papastavrou shared a panel with DG Energy chief Ditte Juul Jorgensen.

Alexandros Exarchou, the politically connected mogul whose Atlantic SEE LNG Trade holds the long-term supply agreements underpinning the corridor, attended for the third time in a year, representing the project’s commercial interests. Exarchou was blunt: the northern EU member states are actively undermining the project, preferring scenarios that leave the door open to resumed Russian gas dependence and discouraging Eastern European buyers from signing long-term US LNG contracts.

We view the Commission’s approval as a political decision shaped by US-Greek pressure rather than a change of heart on the merits.

Jorgensen had previously warned about Europe’s dependency risk from US LNG; her implied endorsement in Houston represents a tangible shift. It is set against a wider tension: the European Parliament has introduced clauses allowing suspension of the €750bn EU-US energy trade deal if Washington imposes new tariffs, creating a live political risk to the supply architecture underpinning the corridor.

Competitive, But Not the Cheapest

The new deal prices Vertical Corridor tariffs roughly at the midpoint between competing routes — a substantial improvement, though not a slam dunk. The existing products expire at the end of March; the first auction under the new framework is planned for July, with delivery starting 26 October.

Investor Signal

The tariff deal is the most substantive commercial progress the Vertical Corridor has made since its launch. But the July auction is the real test, and longer-term viability still depends on something no regulatory fix can deliver: long-term LNG purchase commitments from Eastern European buyers. Without those, financing for a second Aegean FSRU and expansion into the Western Balkans may not materialize.

The Iran war adds complexity. Supply anxiety makes the case for diversified LNG infrastructure more urgent in principle, but disruption to tanker supply chains and elevated freight costs increase the delivered cost of US LNG into the corridor, potentially widening the gap with Baltic alternatives. Eastern European buyers are unlikely to commit to long-term contracts while disruption persists.

Signposts to Watch

1. Northern EU member states’ resistance will resurface at any future request for subsidy or regulatory carve-out.
2. The Russia variable remains live. Long-term contracts are unlikely to be signed until buyers are convinced that TurkStream will be definitively closed after autumn 2027. If that looks uncertain — through political compromise or a Ukraine settlement — the commercial case weakens sharply.