Tekli yapısal kırılma testinin verimli piyasa hipotezi üzerindeki ampirik çalışma ile performans analizi

In this thesis, performance of the single structural break tests is examined. Since ithas proved superiority of Sequential F test on other single break tests, it is chosen assingle break test. Monte Carlo simulation is run for different scenarios and performancesof the test with respect to estimating break points, and parameters, and rejecting oraccepting the joint null hypothesis is observed. For all cases small sample bias isobserved. The test estimates parameters correctly for large samples but for small samplesit underestimates or overestimates parameters. Another common problem is about jointnull hypothesis. When test rejects the joint null, it doesn?t identify which of the jointhypothesis is rejected. Therefore in this study, we utilize the t-statistic of the parametersto determine the individual hypothesis rejected. In addition to these common problemswe illustrate other scenario specific problems in this study. We examine the implicationsof our Monte Carlo findings by applying the break test to real life data and investigate theefficient market hypothesis using stock market data on SP&500. Application of thesequential F test shows evidence against the efficient market hypothesis.Keywords: Structural Break, Sequential F Test, Efficient Market Hypothesis