Stocks are still up today -- big surprise there -- but some big-time momentum names are sliding.
Doug Kass notes that both Apple and Netflix and Chipotle shares are all underperforming the market, a worrisome indication that momentum is running out.
If Apple does close lower, that would mark the second consecutive day of under-performance. Also underperforming yesterday was Goldman Sachs, normally thought to be in the "leadership" category.
