China’s woes have pummeled global markets in recent days, but that’s not a problem for top tech stock CDW (CDW). The provider of information technology hardware and software hit a new high Thursday, climbing 56 cents to 40.04 as the market rebounded for a second day. It’s in buying range, 2% past a 39.42 entry of a 14-week consolidation. All of CDW’s customers are in North America, mostly in the U.S.; it has no exposure to China.