Inflation-Protected Security (IPS) A type of fixed-income investment that guarantees a real rate of return. The real rate of return is the nominal return, less the inflation rate, thus protecting investors from inflation. Investopedia Says: The purchase of IPS products is most often done with government products, such as Treasury inflation-protected securities (TIPS), but private sector companies also offer these products. Related Terms: Corporate Inflation-Linked Securities Dollar Bond Index-Linked Securities - Dollar BILS Inflation Inflation Risk Inflation-Linked Savings Bonds - I Bonds Nominal Interest Rate Real Rate of Return Securitization Treasury Inflation-Protected Securities - TIPS |