Schwab Center for Financial Research Recent articles Market Volatility Market Volatility, Trading Halts, and Circuit Breakers by Schwab Center for Financial Research November 4, 2020 Exchanges may halt trading when the S&P 500 Index® drops quickly. Here’s how “circuit breakers” work and what they’re supposed to do. Market Commentary Quarterly Market Outlook: Is Seasonal Volatility Ahead? by Schwab Center for Financial Research September 15, 2021 September and October tend to be blustery months for stock performance, and this year may be no exception. Portfolio Management Personal Finance & Planning What’s in Your Portfolio? The Role of Various Asset Classes by Schwab Center for Financial Research August 10, 2021 Stocks, bonds, commodities, and other asset classes each play a unique role in your portfolio.