'Narrow' leadership is creating more fragility in markets

US stocks (^DJI, ^IXIC, ^GSPC) managed to close Wednesday trading in positive territory, all three of the indexes eking out fresh record highs. Looking back on the latest earnings season, Northwestern Mutual Wealth Management chief portfolio manager Matt Stucky comes on Market Domination Overtime to describe the sort of "narrow" leadership forming in an already "fragile" market.