Non-Periodic Cycles and Long Memory Property in the Korean Stock Market *

This paper presents evidence on long memory and the identification of non-periodic cycles in Korean stock market returns. Adjusted R/S analysis is used to distinguish how the stock returns differ from an independent and identically distributed series. Unlike standard techniques that identify only regular periodic cycles, this analysis is able to capture not only the long memory properties but also the presence of non-periodic cycles in the Korean stock market returns. The identification of non-periodic cycles (approximately two and four years in average duration) corresponds to the term of the business cycle of the Korean economy.

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