Some of the most popular stocks on Wall Street may have a challenging path forward in the new year.One week from today, we'll be ringing in a new year -- and investors are likely to be smiling from ear to ear. As of the closing bell on Dec. 19, the ageless Dow Jones Industrial Average, benchmark S&P 500, and growth-focused Nasdaq Composite had, respectively, climbed by 14%, 16%, and 20% year-to-date.Although the stock market's major indexes have an unblemished track record of rising over multidecade periods ...