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This study investigates the daily and monthly data of nine major categories of funds from 1997 to 2008. It hopes to verify if lead–lag relations exist amid different categories of funds. The study has come up with two major conclusions: (1) the funds in respective categories mostly have a regular cyclical phenomenon; (2) three kinds of lead–lag relations in return exist amid various categories of funds, in which the first kind of relations is bond funds leading equity funds and equity funds leading energy funds, the second kind of relations is bond funds leading technology funds and technology funds leading energy funds and the third kind of relations is currency funds leading real estate funds. Thus, the investors can not only optimize their investment portfolios but also know the timing that they should buy or sell the funds' position.