Here is a recap of market performance for the month of December and 2021 overall: After a down month in November, investment returns rebounded in December. International stocks performed best, while US large cap and small cap stocks also had strong months. Bonds slightly declined. In 2021, investors were rewarded for owning stocks. All three stock categories increased by double digits. Bonds had a rather uneventful year and detracted from returns. But overall, for most investors with a diversified portfolio, 2021 was a positive year.