Ever since the Renewable Portfolio Standard (RPS) policy was implemented to reduce greenhouse gas emissions and diversify energy sources to utilize eco-friendly energy, the transaction method for Renewable Energy Certificates (RECs) has been evolving. The REC spot market, which can theoretically best reflect the opportunity cost and feasibility of renewable power generation, has provided a key compensation index for expensive power generation projects. Unlike previous studies, which have mostly focused on the effectiveness of renewable energy supply, this paper provides policy implications by using micro data such as price spreads and position status in the spot market. We analyze the buy/sell price spread and positions as potential price determining factors that might psychologically affect buyers and hence contribute to the continuous price fall that has taken place since the two-way transaction method was introduced in 2017.

[Key Words] Renewable Portfolio Standard, Renewable Energy Ceritificate, Two-Way Transaction, Price Volatility