This essential provides an overview of current forms of portfolio insurance and the applicability of constant-proportion portfolio insurance with various financial instruments across different money and capital markets. The empirical investigation using historical data spans over six years and is unparalleled in this scope. The presentation and methodology within the strategy are detailed and supported by examples for replicability. The same applies to the empirical results of the different financial instruments that are protected by portfolio insurance. The findings clearly indicate that transaction costs do not have a significant impact on the outcomes of the strategies, while negative interest rates can significantly adversely affect success.