Stocks vs volatility: which one leads, which one follows? Even as US stocks kept breaking records lately, the stock market "fear index," the VIX, has been rising. Robert Kelley gives a few illuminating answers. In Part 2, Robert tells you if momentum has been supporting the recent rally and gives you his latest on the sectors' strength. Part 2 is reserved for subscribers. Learn more about Robert's U.S. Intraday Stocks Pro Service at bit.ly/etv013118.