Inflation and Your Portfolio Even low inflation rates can pose a threat to investment returns. Share | Related Content Bursting the Bubble Tulips were the first, but they won’t be the last. What forms a “bubble” and what causes them to burst? Estimating the Cost of College This worksheet can help you estimate the costs of a four-year college program. How Compound Interest Works Use this calculator to better see the potential impact of compound interest on an asset.