The Power of Tax-Deferred Growth Why are 401(k) plans, annuities, and IRAs so popular? Share | Related Content Social Security: By the Numbers Here are five facts about Social Security that might surprise you. Should You Borrow from Your 401(k)? Does it make sense to borrow from my 401(k) to pay off debt or to make a major purchase? Investment Strategies for Retirement Investment tools and strategies that can enable you to pursue your retirement goals.