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- Recently, Korea's electric industry has experienced substantial changes in its structure and function, including the introduction of competition in the generation sector. Korea is in the early stages of market competition where the market price is determined by generation costs. In the future, the market price will be determined by generators' bids.Therefore, the generators' profit is determined by market pool price, the prospects of pool price are very important for new capacity investment decision made by generators and IPPs.This study analyzes hourly marginal costs and LOLP considering basic generation mix and characteristics, develops the relationship of pool price and profit by generation-type using the change in reserve margin, and proposes basic direction for profits variation and supply-demand analysis in the electricity market in future.