Investment Bull & Bear Markets: A Timeline Related Content 18 Years’ Worth of Days The average retirement lasts for 18 years, with many lasting even longer. Will you fill your post-retirement days with purpose? What’s Your Investment IQ? You make decisions for your portfolio, but how much do you really know about the products you buy? Try this quiz Will Power Preparing for the eventual distribution of your assets may not sound enticing. But a will puts the power in your hands.