퍼지 모델을 이용한 일별 주가 예측
Daily Stock Price Prediction Using Fuzzy Model
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초록
본 논문에서는 주가의 일별 시가, 종가, 최고가, 최저가를 예측하기 위한 퍼지모델을 제안한다. 주가는 시장의 여러 경제 변수에 의존하므로 주가예측 모델의 입력변수를 선택하는 것은 쉽지 않은 일이다. 이와 관련하여 많은 연구가 있지만 정답이 있는 것은 아니다. 본 논문에서는 이를 해결하기 위해 주가 움직임 자체에 주목하는 스틱차트의 기술적 분석에 이용되는 정보를 퍼지규칙의 입력변수로 선택한다. 퍼지규칙은 사다리꼴 멤버쉽함수로 이루어진 전건부와 비선형 수식의 후건부로 구성된다. 최적의 퍼지규칙으로 구성된 퍼지모델을 찾아내기 위해 차분진화가 사용된다. 본 논문에 제안된 방법은 수치 예를 통해 다른 방법과의 비교로 타당성이 검토되며 KOSPI(KOrea composite Stock Price Index) 일별 데이터를 사용, 주가예측 퍼지모델을 구축하고 신경회로망 모델과 비교, 검토된다.
Abstract
In this paper an approach to building fuzzy model to predict daily open, close, high, and low stock prices is presented. One of prior problems in building a stock prediction model is to select most effective indicators for the stock prediction. The problem is overcome by the selection of information used in the analysis of stick-chart as the input variables of our fuzzy model. The fuzzy rules have the premise and the consequent, in which they are composed of trapezoidal membership functions, and nonlinear equations, respectively. DE(Differential Evolution) searches optimal fuzzy rules through an evolutionary process. To evaluate the effectiveness of the proposed approach numerical example is considered. The fuzzy models to predict open, high, low, and close prices of KOSPI(KOrea composite Stock Price Index) on a daily basis are built, and their performances are demonstrated and compared with those of neural network.
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