The Southeast Europe electricity market opened the week with a decisive shift back toward tighter system balance, led by a sharp rebound in Hungary and a synchronized upward move across most regional hubs. The day-ahead market settled firmly higher across Central and Southeast Europe, with Hungary (HUPX) at 110.81 €/MWh, re-establishing itself as the regional price leader and pulling neighboring markets into a higher band. Romania cleared at 103.72 €/MWh, Bulgaria and Greece both at 100.39 €/MWh, Croatia at 99.92 €/MWh, Slovenia at 99.66 €/MWh, while Serbia moved up to 95.75 €/MWh, confirming a return toward the regional mean after a weaker Sunday profile. At the lower end, North Macedonia at 87.77 €/MWh, Albania at 79.44 €/MWh, and particularly Montenegro at 67.13 €/MWh remained structurally discounted, though not sufficiently to offset the broader regional uplift.
The defining feature of the session was the widening of the Central European premium. The HU-DE spread expanded to 37.32 €/MWh, marking a substantial day-on-day increase and confirming that Hungary once again acted as the marginal pricing node for the region. This widening differential effectively transmitted higher price signals into SEE while maintaining internal coupling among Balkan markets. Spreads within the region remained relatively compressed, indicating that price formation was externally driven rather than a result of localized congestion or isolation.
Cross-border flows aligned closely with this price behavior. The regional system flipped back into an import-dependent position, with net regional import at -158 MW, compared with exports in the previous session. More importantly, core imports surged to 1,943 MW, reflecting a sharp increase in reliance on inflows from Central Europe. The broader interconnection landscape showed strong north-to-south transmission, with high loading across key corridors linking Austria, Slovakia, Hungary and Italy, exceeding 5.5 GW in aggregate flows. This confirms that marginal pricing in SEE was effectively set by imported generation, rather than internal supply.
Fundamentals shifted materially compared with the weekend. Total consumption rose to 32,599 MW, up 3,780 MW day on day, while generation declined to 31,283 MW, down 552 MW. The renewable profile weakened, with wind output falling to 1,875 MW (-239 MW) and hydro generation declining to 6,422 MW (-503 MW). Although solar increased to 4,290 MW, it was insufficient to offset the drop in dispatchable renewables. The resulting gap was filled by thermal generation and imports, with coal at 6,403 MW, gas at 5,071 MW, and nuclear at 5,604 MW forming the marginal supply stack. This combination of higher load and weaker renewable support is consistent with the observed upward pressure on prices.
Intraday price structure remained highly pronounced, reinforcing the structural volatility profile of the region. Across exchanges, midday prices were significantly compressed, in some cases approaching zero, reflecting solar saturation. However, evening hours continued to price extreme scarcity. Hungary recorded a maximum price of 250 €/MWh, Romania 197.5 €/MWh, Serbia 185.5 €/MWh, Croatia 183.5 €/MWh, and most regional markets clustered near 180 €/MWh peaks during hours 19–20. The persistence of this steep intraday curve highlights that trading value remains concentrated in hourly optimization rather than baseload positioning.
Serbia’s SEEPEX market provided a particularly clear signal of this structural dynamic. The day-ahead average rose to 95.8 €/MWh, up from 70.2 €/MWh the previous day. However, the product split revealed an inversion: off-peak at 116.0 €/MWh exceeded peak at 75.5 €/MWh, indicating stronger pricing in non-solar hours and continued evening scarcity. This inversion is increasingly characteristic of systems with growing solar penetration but limited storage and flexible balancing capacity. For traders and asset operators, this reinforces the importance of flexibility assets, including batteries, hydro dispatch optimization, and cross-border arbitrage.
Forward markets remained firm but did not fully follow spot volatility. Hungarian forward prices indicated Week 12 at 118 €/MWh, Week 13 at 113 €/MWh, April-26 at 100 €/MWh, and Cal-26 at 109 €/MWh, suggesting that the forward curve is pricing a structurally tight but stable system rather than sustained spot spikes. On the fuel side, CEGH gas was at 50.66 €/MWh, while EUA carbon allowances hovered around 69–75 €/t depending on tenor. The relative stability in gas and carbon underscores that the day’s price movement was primarily driven by system fundamentals and cross-border flows rather than input cost shocks.
Structural developments in market integration continue to evolve. The announced expansion of CROPEX into Slovenia signals deeper coupling between the two markets, which is expected to enhance liquidity and reduce persistent price spreads over time. For trading strategies, this implies a gradual shift away from structural arbitrage opportunities toward shorter-duration, flow-driven inefficiencies.
Flow patterns across the region further confirm the dominance of key corridors in price formation. Strong commercial exchanges such as Romania to Hungary, Romania to Serbia, Bulgaria to Serbia, and Croatia to Bosnia and Herzegovina illustrate that SEE markets remain interconnected through a limited number of high-impact transmission routes. Hungary and Greece continue to act as demand anchors, while Romania and Bulgaria frequently provide export support depending on hydro and nuclear availability. This corridor-based structure remains central to understanding price movements and arbitrage opportunities.
The overall trading signal for the session is consistent and actionable. The market is operating in a regime defined by strong demand recovery, weaker renewable output, increased reliance on imports, and a pronounced intraday scarcity premium. Hungary remains the primary pricing driver, while the rest of SEE follows within a relatively tight band, except for structurally discounted southern markets. Under these conditions, trading value continues to concentrate in cross-border spreads into Central Europe, hourly shape optimization, and flexibility-driven strategies, rather than directional baseload exposure.