Investments which are made by referencing BIST-100 or derivative instruments clinged to index may cause negative returns during the periods of negative index. Investment firms develops various models for their funds and investment instruments in order to avoid negative movements of indexes. Second order stochastic dominance, which removes the weakpoints of ormal distribution-variance maximization method, is one of developed models to protect from negative return movements of indexes. In this implementation, BIST-100 Index datas are tested with second order stochastic dominance method, and dominant stocks, which are going to be a new portfolio and stemmed from BIST-100 index, are defined. In the subsequent process, the performance between this new portfolio and BIST-100 Index is compared.