and ron insana joins as well, cnbc senior analyst and commentator and co-ceo of capital partners and more. >> or less >> or less. >> malcolm, let me start you with why should we be concerned that the leadership in the market seems so narrow? >> yes, tyler, it's concerning because when fewer stocks across each sector are participating in that rally, it means the rally is more likely to fizzle out and the market is more vulnerable to a pull-back. this is coming from someone whose own personal portfolio over indexes toward tech so i'm happy to see the s&p up and carried by these names but concerned when we see three stocks doing all of the heavy lifting because there is no way to get out of the way when the trade goes in the other direction? >> you share that view, ron? >> to a point. although we've seen the market breadth expand a little bit. it is a bit of a breadth thrust. >> okay. >> that's what they call it. >> okay. >> that's a fickle term. but i think my bigger concerns are really around not so much of the narrowness of the advance but what the head winds are still facing the mar