what are the best blue chip companies to invest in?
['Berkshire Hathaway (BRK. B, BRK. A)', 'AbbVie (ABBV)', 'Alibaba Group Holding (BABA)', 'Johnson & Johnson (JNJ)', 'Facebook (FB)', 'British American Tobacco (BTI)', "McDonald's Corp. (MCD)", 'Duke Energy (DUK)']