Author Bio A Fool since 2010, and a graduate from UC San Diego with a B.A. in Economics, Sean specializes in the healthcare sector and investment planning. You'll often find him writing about Obamacare, marijuana, drug and device development, Social Security, taxes, retirement issues and general macroeconomic topics of interest. Follow @TMFUltraLong S&P 500 (SNPINDEX:^GSPC) plunged into bear market territory faster than ever before. The ensuing eight-plus months brought a ferocious snap-back rally. When the checkered flag waves in a little over two weeks, we might be looking at gains well above historical norms. Can we expect a repeat performance in 2021?