Non-technology sectors are performing well and providing market support, but extreme volatility in chip stocks is creating portfolio uncertainty for average investors despite broader economic strength.

""This extreme volatility is very disconcerting for the average investor when they see these huge swings in their portfolio value," said Tim Ghriskey, senior portfolio strategist at Ingalls & Snyder in New York. "(But) a number of the non-tech sectors are doing well, so it's a real mix here.""