Photo by engin akyurt on UnsplashShould these be in your portfolio?Let’s get the definitions out of the way. TIPS are Treasury Inflation-Protected Securities which have been issued by the U. S. Treasury since 1997. IABs are Inflation-Adjusted Bonds issued by the U. S. Treasury and other countries. TIPS were issued to protect investors against inflation. The principal of a TIPS increases with inflation and decreases with deflation, as measured by the Bureau of Labor Statistics Consumer Price Index for All Urban Consumers. Now it gets a little tricky. While the interest paid is usually adjusted for inflation the principal or face amount always gets adjusted. When interest rates go up more value is added to the face amount of the security and if deflation occurs they are adjusted