Recent developments in the South-East European (SEE) power markets reveal a significant shift in electricity price volatility patterns, indicating deeper structural stress across the region. An analysis conducted on February 24, 2026, highlighted that markets including HUPX, OPCOM, BSP, CROPEX, SEEPEX, BELEN, and ALPEX experienced pronounced price fluctuations during evening peak hours, contrasted by notable price declines during off-peak periods. This trend suggests that volatility is no longer merely episodic but has become a consistent feature of market dynamics.
In Hungary, the hourly electricity prices reached a peak of 177.5 EUR/MWh, while off-peak prices fell below 50 EUR/MWh. Similar trends were observed in Slovenia and Croatia, where scarcity pricing during peak hours intensified despite stable daily demand levels. This shift in pricing behavior is increasingly attributed to the intermittency of renewable energy sources (RES), overshadowing traditional demand shocks as the primary driver of intraday price dynamics.
The decline in solar output during late afternoon hours and persistently low wind generation throughout the day have further exacerbated these conditions. As many SEE markets face limitations in energy storage and ramping capabilities, gas-fired generation has emerged as the marginal source during critical periods. This reliance on gas not only highlights operational challenges but also translates fluctuations in fuel prices directly into electricity prices.
In Serbia and Montenegro, while absolute price volatility appeared less pronounced, relative risk levels were notably higher. The presence of thin order books and limited liquidity within intraday trading led to abrupt price changes rather than gradual transitions. This behavior often obscures underlying system stress until interconnection constraints become binding, at which point market prices can experience sudden and severe adjustments.
Traders are increasingly identifying intraday arbitrage opportunities stemming from delayed price transmission between Hungary and other under-coupled SEE markets. Reports indicate that evening peaks in Hungary frequently precede later price adjustments in Serbia and Montenegro, creating narrow yet consistent trading windows for market participants.
The findings suggest that hourly price curves have evolved into critical indicators of system tightness within the SEE region. As daily average prices fail to adequately reflect risks associated with market imbalances, stakeholders relying solely on flat price exposure may find themselves increasingly vulnerable to heightened volatility and imbalance risks moving forward.
