Economic Observation Network The stock index futures closed at noon, with the main contracts falling across the board. The main contract of CSI 300 Index Futures (IF) fell 1.61%, the main contract of SSE 50 Index Futures (IH) fell 1.09%, the main contract of CSI 500 Index Futures (IC) fell 1.47%, and the main contract of CSI 1000 Index Futures (IM) fell 0.90%.