Bursting the Bubble Tulips were the first, but they won’t be the last. What forms a “bubble” and what causes them to burst? Share | Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Inflation and Your Portfolio Even low inflation rates can pose a threat to investment returns. Global vs. International: What’s The Difference? International funds invest in non-U.S. markets, while global funds may invest in U.S. stocks alongside non-U.S. stocks. 5 Smart Investing Strategies Getting what you want out of your money may require the right game plan.