Recent analysis of the South-East European (SEE) power markets indicates a significant shift in price volatility patterns, with implications for market stability and operational strategies. On 24 February 2026, data from various exchanges including HUPX, OPCOM, BSP, CROPEX, SEEPEX, BELEN, and ALPEX revealed that price fluctuations have transitioned from sporadic episodes to a more structural phenomenon. This change is characterized by pronounced price spikes during evening peak hours and substantial dips during off-peak periods, even in markets where daily averages remain relatively stable.
In Hungary, the peak hourly electricity price reached 177.5 EUR/MWh, contrasting sharply with off-peak prices that fell below 50 EUR/MWh. Similar trends were observed in Slovenia and Croatia, where scarcity pricing during peak hours intensified despite consistent daily demand levels. This evolving price behavior is increasingly attributed to the intermittency of renewable energy sources (RES), rather than fluctuations in demand.
The decline in solar output during late afternoon hours and persistently low wind generation throughout the day has exacerbated these dynamics. As several SEE systems grapple with limited energy storage and constrained ramping capabilities, gas-fired generation has emerged as the marginal source during critical demand periods. This reliance on gas has led to a direct correlation between fuel price volatility and electricity prices.
In Serbia and Montenegro, while absolute price volatility may appear less significant, the relative risk associated with pricing has become more pronounced. The presence of thin order books and limited liquidity within intraday trading has resulted in abrupt price movements rather than gradual adjustments. This behavior often obscures underlying system stress until interconnection limits are reached, at which point prices can experience sharp corrections.
Traders have begun to identify intraday arbitrage opportunities stemming from delayed price responses between Hungary and the less coupled SEE markets. Reports indicate that peaks in Hungarian prices frequently precede adjustments in Serbia and Montenegro, creating narrow trading windows that can be exploited by market participants.
The analysis underscores that hourly price curves are now critical indicators of system tightness within the SEE region. Daily average prices are proving inadequate for capturing risk exposure accurately. Market participants relying on flat price strategies may face heightened volatility and imbalance risks as these structural changes unfold.
