China Financial Futures Exchange will introduce mini-sized contracts for stock index futures to rope in more retail investors after the smooth launch of the new financial instrument, Zhu Yuchen, the general manager of the bourse, said on Thursday.

"We will gradually introduce mini-sized index futures to allow more small and medium investors to trade after the new financial tool runs smoothly for some time," Zhu said.

The mini-sized contracts would be modeled on the ChiNext Index which tracks stocks on China's start-up board for small- and medium-sized enterprises and the Banking Sector Index on the main board in Shanghai, Zhu said.

The securities regulator has set a threshold of 500,000 yuan ($73,225) as the minimum deposit required for index futures accounts, something that bars many small investors from trading.