The Independent Bulgarian Energy Exchange (IBEX) said that an all-time high 1,754,887.8 MWh of electricity traded on its day ahead market in December.
There are 83 active participants on the day ahead market, IBEX said in a statement last week.
The day ahead market was established in 2016.
IBEX, established in 2014, holds a 10-year license by the State Energy and Water Regulatory Commission for organizing a Power Exchange for electricity in Bulgaria.
IBEX is a wholly-owned subsidiary of the Bulgarian Stock Exchange, which acquired the company in 2017.