Jim Cramer revisits top themes: What now? By: CNBC.com News December 19, 2013 at 18:18 PM EST As the new year approaches, Cramer thinks it's prudent to revisit market themes to determine if they remain investable. Read More >> Related Stocks: Biogen Idec Celgene Corp EOG Resources Gilead Sciences Natl Oilwell Varco Noble Energy Regeneron Pharmaceuticals