Report Summary 1. Index Trends - On August 21st, the Shanghai Composite Index rose 0.13% to 3771.1 points with a trading volume of 997.42 billion yuan; the Shenzhen Component Index fell 0.06% to 11919.76 points with a trading volume of 1426.32 billion yuan [1]. - The CSI 1000 Index fell 0.71% with a trading volume of 516.51 billion yuan; the CSI 500 Index fell 0.36% with a trading volume of 404.12 billion yuan; the SSE 50 Index rose 0.53% with a trading volume of 136.49 billion yuan; the CSI 300 Index rose 0.39% with a trading volume of 558.52 billion yuan [1]. 2. Impact of Sector Movements on Indexes - The CSI 1000 dropped 52.12 points compared to the previous close, with sectors like power equipment, machinery, and electronics pulling the index down [2]. - The CSI 500 dropped 23.9 points, with the media sector pulling it up and non - bank finance, power equipment, and electronics pulling it down [2]. - The CSI 300 rose 16.67 points, driven up by sectors such as banks, pharmaceuticals, and communications [2]. - The SSE 50 rose 15.19 points, boosted by banks, communications, and petroleum and petrochemicals [2]. 3. Stock Index Futures Basis and Annualized Opening Costs - For IM contracts, IM00 had an average daily basis of - 60.53, IM01 of - 107.71, IM02 of - 212.17, and IM03 of - 364.91 [13]. - For IC contracts, IC00 had an average daily basis of - 60.14, IC01 of - 98.23, IC02 of - 184.34, and IC03 of - 310.15 [13]. - For IF contracts, IF00 had an average daily basis of - 9.13, IF01 of - 16.06, IF02 of - 28.63, and IF03 of - 49.68 [13]. - For IH contracts, IH00 had an average daily basis of 0.85, IH01 of 0.7, IH02 of 2.49, and IH03 of 5.13 [13]. 4. Stock Index Futures Roll - over Point Differences and Annualized Costs - For IM contracts, data on roll - over point differences and their annualized costs at different time points from 09:45 to 15:00 are provided, e.g., at 09:45, IM00 - 01 was - 73.02267 [24]. - For IC contracts, similar data are given, such as at 09:45, IC00 - 01 was - 68.64222 [21]. - For IF contracts, at 09:45, IF00 - 01 was - 12.31678 [22]. - For IH contracts, at 09:45, IH00 - 01 was 0.707 [23].