ChiNext Index opened 0.35 percent, or 3.78 points lower to open at 1,089.99 points Tuesday.

The index, officially launched on June 1, 2010 on the Shenzhen Stock Exchange, has a base value of 1,000 points.

The ChiNext Index, together with the Shenzhen Component Index and the Shenzhen SME (small and medium-sized enterprises) Board Index, makes up the three core indices reflecting the performance of China's stocks listed on the Shenzhen Stock Exchange.