Apple Inc. (NASDAQ: AAPL) was the big lynchpin here for why there was so much expected upside for the Dow in 2016. Apple would not have been able to join the Dow prior to its seven-for-one stock split, but it ranks as the tenth largest weighting in the Dow at 4.1%. Analysts on average were expecting upside of 42.58%, if you include the dividend as of the end of 2015. 24/7 Wall St. warned readers that this analyst optimism would come down in 2016 and it already did.