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? The Great Debate Continues: Active vs. Passive In investments, one great debate asks the question, “Active or Passive Investing: Which Is Better?” Saving for College This calculator can help you estimate how much you should be saving for college.