基差与VIX双双回落，尾部风险持续预警

• The report introduces the Cinda-VIX volatility index, which reflects investors' expectations of future volatility in the options market. The index is structured to capture different time horizons, providing insights into short-term and long-term volatility expectations. As of November 7, 2025, the 30-day Cinda-VIX values for major indices are: 18.55 for SSE 50, 19.17 for CSI 300, 26.21 for CSI 500, and 23.84 for CSI 1000[64][66][67] - The Cinda-SKEW index measures the skewness of implied volatility across different strike prices in the options market. It captures market sentiment regarding tail risks, with higher values indicating increased concern about potential market downturns. As of November 7, 2025, the SKEW values for major indices are: 103.82 for SSE 50, 108.08 for CSI 300, 101.38 for CSI 500, and 106.80 for CSI 1000[73][76][78] - The report evaluates index futures basis adjustment, where the annualized basis is calculated as: $ Annualized Basis = (Actual Basis + Expected Dividend Points) / Index Price × 360 / Remaining Days of Contract $ This adjustment accounts for the impact of dividends on futures prices during the contract's lifespan[20][21][28] - The IC futures contract (CSI 500) shows a downward trend in annualized basis, with a current basis of -9.74% as of November 7, 2025, lower than the median since 2022. The contract's trading volume and open interest have decreased compared to the previous week[21][22][27] - The IF futures contract (CSI 300) exhibits a current annualized basis of -2.96%, also below the median since 2022. Trading volume and open interest for IF contracts have similarly declined week-over-week[28][29][32] - The IH futures contract (SSE 50) has a current annualized basis of -0.24%, reflecting a decrease from the previous week. Open interest and trading volume for IH contracts have also reduced[33][34][37] - The IM futures contract (CSI 1000) shows a current annualized basis of -12.49%, marking a decline from the prior week. Open interest and trading volume for IM contracts have decreased as well[39][41][44] - The report evaluates hedging strategies for index futures, including continuous hedging and minimum basis strategies. Continuous hedging involves rolling over contracts near expiration, while minimum basis strategies select contracts with the smallest basis. Both strategies are tested across IC, IF, IH, and IM futures contracts[46][47][48] - IC hedging strategy results: - Annualized returns: -3.20% (monthly), -2.20% (quarterly), -1.69% (minimum basis) - Volatility: 3.84% (monthly), 4.76% (quarterly), 4.56% (minimum basis) - Maximum drawdown: -10.25% (monthly), -8.34% (quarterly), -7.97% (minimum basis) - Net value: 0.8990 (monthly), 0.9297 (quarterly), 0.9459 (minimum basis)[49][50][52] - IF hedging strategy results: - Annualized returns: 0.43% (monthly), 0.72% (quarterly), 1.18% (minimum basis) - Volatility: 2.93% (monthly), 3.28% (quarterly), 3.05% (minimum basis) - Maximum drawdown: -3.95% (monthly), -4.03% (quarterly), -4.06% (minimum basis) - Net value: 1.0141 (monthly), 1.0237 (quarterly), 1.0391 (minimum basis)[51][55][54] - IH hedging strategy results: - Annualized returns: 1.09% (monthly), 1.99% (quarterly), 1.72% (minimum basis) - Volatility: 3.01% (monthly), 3.41% (quarterly), 3.02% (minimum basis) - Maximum drawdown: -4.22% (monthly), -3.75% (quarterly), -3.91% (minimum basis) - Net value: 1.0361 (monthly), 1.0668 (quarterly), 1.0574 (minimum basis)[56][59][58] - IM hedging strategy results: - Annualized returns: -6.26% (monthly), -4.58% (quarterly), -4.20% (minimum basis) - Volatility: 4.75% (monthly), 5.78% (quarterly), 5.54% (minimum basis) - Maximum drawdown: -14.00% (monthly), -12.63% (quarterly), -11.11% (minimum basis) - Net value: 0.8282 (monthly), 0.8437 (quarterly), 0.8620 (minimum basis)[60][61][62]