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Iran Conflict 2026
6AUG

CEGH pays a one-day ban premium

3 min read
15:43UTC

The CEGH-TTF day-ahead basis widened to roughly €1.62/MWh on 17 June, four times its pre-ban reading, then compressed back toward flat the next day as Iran relief firmed TTF.

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Key takeaway

CEGH paid a €1.62 ban premium over TTF for one session, then compressed to flat as TTF firmed.

The basis between the Central European Gas Hub (CEGH) and TTF widened to roughly €1.62/MWh on a day-ahead basis on 17 June, the ban-binding day, around four times the €0.41 reading of 11 June , on CEGH exchange data 1. CEGH is Austria's virtual trading point at Baumgarten, historically tracking TTF closely; the basis is the premium Central European buyers pay over the Dutch benchmark. CEGH day-ahead settled €42.742, the €1.62 gap sitting above the same-day TTF print covered in event 2.

The widening reflected one-day supply uncertainty at the Kipi margin, the Greek-Turkish pipeline crossing through which non-EU molecules enter the grid, as the ban bound. It was small and physical, consistent with TurkStream's long-term contracts staying exempt to September 2027 , which limited the volume the regulation actually removed. The market had already isolated this premium as an uncorroborated bid that diverged from the flat prompt .

The premium did not hold. On 18 June, the Iran-relief session, CEGH eased to €42.050 and the basis compressed back toward flat as TTF firmed 2. The widening was a single-session event, not a structural step-change, but it was tradeable: a desk that bought the CEGH-TTF basis into the binding date and sold it the next day captured the one mark the ban left on the curve. The lesson for a Central European basis trader is narrow: the regulation's physical bite was a one-day move at one hub, not a durable repricing.

Deep Analysis

In plain English

Austria trades gas at a virtual hub called CEGH. Usually it costs very slightly more than the main European price (TTF in the Netherlands) because Austria sits further from the main supply routes. When a new EU rule banning short-term Russian gas pipeline contracts took effect on 17 June, traders buying gas for delivery into Austria the next day were uncertain whether supplies arriving via a Turkish pipeline at the Greek border would still flow. To be safe, they paid a bit more for Austrian gas, about €1.62 above the Dutch price, four times the usual gap. By the next day it was clear the pipelines had kept flowing and the uncertainty had passed. The premium evaporated. The episode showed that the ban had real, if brief, supply implications for Central European buyers, even though the biggest pipeline; TurkStream, is exempt from the ban until 2027.

Deep Analysis
Root Causes

Baumgarten's virtual clearing price (CEGH) reflects the risk that physical molecules nominated at the Kipi border crossing might not flow at contracted volumes. When Regulation 2026/261 bound on 17 June, the short-term contracts at Kipi became unenforceable, creating a one-day uncertainty over whether day-ahead nominations would clear.

TurkStream's long-term contracts for Hungary (MVM 3.5 bcm, ) and Slovakia were exempt, but the Kipi margin, covering short-term contracts for Austrian and Czech buyers, was not.

The one-day nature of the widening shows the physical volume at the Kipi short-term margin was small relative to total Central European supply. Once the 18 June day-ahead nominations cleared normally, the supply uncertainty resolved and CEGH eased back toward TTF. The residual structural question is whether BOTAS origin-blending at Kipi means the effective supply was never disrupted, in which case the €1.62 widening overstated the physical risk.

What could happen next?
  • Risk

    A successful Slovakia CJEU interim stay would reopen short-term contract volumes at Kipi and could generate a CEGH-TTF basis compression of EUR 1-2/MWh, the inverse of the 17 June widening, as the ban uncertainty would lift.

  • Precedent

    The single-session basis widening with same-day compression confirms that CEGH-TTF basis trading requires intraday risk management around ban-binding dates; overnight positions face gap risk that one-day implied volatility models underestimate.

Sources:Central European Gas Hub
Mentions:Kipi →TurkStream →Slovakia →Netherlands →REMIT →CJEU →BOTAS →Iran →ACER →Russia →Austria →TTF →CEGH →
First Reported In

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Central European Gas Hub· 18 Jun 2026
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Causes and effects
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Central European gas basis nearly vanishes before ban
CEGH-TTF basis compressed to EUR 0.41 pre-ban on 11 June; widened to EUR 1.62 on the ban-binding day, then recompressed, confirming the procedural read.
Occurred 11 Jun 2026
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The ban's own text makes it porous
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Ban spares the contracts that matter
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