The Power of Compound Interest Learn how to harness the power of compound interest for your investments. Share | Related Content Who Is Your Trusted Contact? This investment account question is vital and answered as early as possible. Taxable vs. Tax-Deferred Savings Use this calculator to compare the future value of investments with different tax consequences. Immediate vs. Deferred Annuities Looking forward to retirement? It's critical to understand the difference between immediate and deferred annuities.