Negative prices as opportunity for EPS portfolio optimization

9/17/2026
Davor Pupovac, EPS Director of Market Analysis and Risk Management in Electricity Trading, at RES Serbia 2026 Conference

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Elektroprivreda Srbije used the period of negative electricity prices for portfolio optimization – said Davor Pupovac, EPS Director of Market Analysis and Risk Management in Electricity Trading, at RES Serbia 2026 Conference “The New Electricity Market Architecture – from Generation to System Flexibility” Panel.

When prices are negative, everything depends on the portfolio position. A significant volume of energy was purchased at negative prices, which was particularly common during April and May. Later on, negative prices also appeared on SEEPEX – said Pupovac.

He highlighted that the period of extremely low, and even negative, prices was the result of specific market conditions in the first quarter, including favourable hydrology and energy surplus in the region created due to CBAM. According to him, it was precisely that surplus that led to further decline in prices during the first quarter.

Pupovac highlighted that EPS strived to take advantage of market conditions to optimize its portfolio management, including procuring electricity during the periods of very low prices.

Speaking about trading and optimization opportunities, he stressed the impact of CBAM on the regional market.

We would prefer CBAM not to exist, as it would allow us to optimize our position across several markets. Sometimes we optimize our position, sometimes we need to buy. CBAM has created a situation in which market liquidity is no longer what it used to be, and price differences between markets are no longer as significant, reducing opportunities to buy at low prices and sell at high prices – said Pupovac and added that such situation further demonstrated how important flexibility and ability to manage different energy sources were.

He pointed out that market coupling is important for future portfolio balancing, particularly bearing in mind the growing share of variable renewable energy sources.

We hoped for market coupling, the integration of regional markets, as we would be able to integrate an even greater share of variable renewable energy sources into our portfolio – said Pupovac.

He concluded that current market conditions were complex and that long-term price trends were difficult to predict, but that EPS wished to maintain an active role at the market and continue developing portfolio capable of meeting the growing demands for system flexibility.

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