It was supposed to be the face of new China — a stock market in the technology hub of Shenzhen designed to nurture future stars like Alibaba Group Holding Ltd. and Tencent Holdings Ltd. Yet the ChiNext market set up in 2009 is proving a dud, at least when measured against the old-economy heavy Shanghai Composite Index in recent months. That’s in face of economic data that show how the new growth drivers — consumption and services, where private companies dominate — are in good shape.