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
One of the most volatile years on record for the stock market has officially come to a close. Despite losing over a third of its value during the first quarter, the widely followed
S&P 500 ended the year on a high note, with the index advancing by a double-digit percentage.