How much is your portfolio down? This much? By: CNBC.com News January 22, 2016 at 13:18 PM EST The stock market correction has been tough enough on Wall Street pros, but it's exacted an even worse toll on retail investors. Read More >> Related Stocks: Alphabet-A Apple Cameron International Devon Energy Kohl's Corp Microsoft Precision Castparts Qualcomm, Inc. Sentinelone Inc Cl A