证券研究报告 | 2025年12月12日 （3）越临近交割日，转换期权的选择权价值越低，正套操作越依赖 CTD 券 的 IRR 对整体收益的贡献。 固收+系列报告之七 国债期货套利：正向套利实证研究 国债期货的套利策略可以为"固收+"产品提供一层"安全垫"。因为其收 益来源是锁定的期现价差，与债券市场的涨跌关联度较低，更依赖于市场定 价的短期失灵。这为组合贡献了与股市、债市相关性都较低的确定收益来源。 本文通过实证研究分析我国国债期货的正向套利收益。 国债期货无风险套利简介：国债期货无风险套利的核心是期现套利，即利用 国债期货和国债现货之间的定价偏差来获利，其最终是通过交割来锁定收 益。IRR（隐含回购利率）是指通过正向套利（买入现货、同时卖出期货， 并持有到期进行交割）所能获得的年化收益率。 国债期货正套操作原理：理论上来说，当国债期货 CTD 券的 IRR 大于融资成 本时，即存在正向套利机会。其套利逻辑为，融资买入 CTD 现券，并卖空对 应份数的期货合约从而锁定持有期收益，并在交割日完成交割，最终收益率 即为 IRR 与资金成本之差。 实际正向套利过程中往往会遇到三种情形：一是建仓至交割 CTD 券不 ...

Group 1: Stock Index Futures Market Overview - The four major index futures contracts experienced an overall increase last week, with the CSI 500 index futures showing the largest gain of 3.83%, while the SSE 50 index futures had the smallest increase of 1.00% [3][11] - The average trading volume for all contracts decreased compared to the previous week, with the IH contract seeing the largest decline of 24.59% and the IC contract the smallest at 5.41% [3][11] - As of last Friday's close, the annualized basis rates for the IF, IC, IM, and IH contracts were -2.18%, -8.76%, -13.22%, and 0.11% respectively, indicating a deepening of the discount for IF and IM, while IC's discount narrowed and IH turned to a premium [3][11][12] Group 2: Market Expectations and Strategies - In the absence of changes to index futures trading rules, the correlation between basis changes and dividend impacts, as well as investor trading sentiment, remains high [4][13] - The market sentiment is generally optimistic, with 12 brokerage firms believing that the A-share market is still in a bull or slow bull phase, and 9 firms indicating that expectations of Federal Reserve rate cuts and foreign capital inflows will improve liquidity [5][30] - There is a consensus among 12 brokerage firms regarding the positive outlook for the AI industry chain, non-bank financials, and gold sectors, while some firms express differing views on market styles and cycles [5][31] Group 3: Dividend Forecasts and Impacts - Following September, dividends are expected to taper off, having a minimal impact on the four major index futures [4][12] - The estimated impact of dividends on the main contracts for the CSI 300, CSI 500, SSE 50, and CSI 1000 indices for September is projected to be zero, with a slight impact of 0.04 on the CSI 500 quarterly contract [4][12] Group 4: Arbitrage Opportunities - The report indicates that currently, there are no arbitrage opportunities for the IF main contract, as the required basis rates for both long and short positions do not meet the necessary thresholds [4][12] - The cross-period price difference for the contracts is within historical normal ranges, suggesting a stable market environment for potential arbitrage strategies [12][13]

Core Viewpoint - The shipping index (European line) futures experienced a significant decline, with the main contract dropping over 6%, indicating a bearish trend in the market [2][3]. Group 1: Market Performance - On June 24, the shipping index (European line) futures fell to a low of 1746.4 points, closing at 1784.1 points, reflecting a decline of 6.36% [1]. - The latest SCFIS European line index recorded 1937.14 points, showing a slight increase of 14.1 points from the previous period [2][3]. Group 2: Price Adjustments - Shipping companies are showing signs of price adjustments, with Hapag-Lloyd reducing July mid-month rates from $2635/$4335 to $2435/$3835, representing decreases of 8% and 12% for small and large containers, respectively [2]. - CMA CGM has also adjusted its rates downwards, indicating that booking conditions are not meeting expectations, with a notable price reduction of $15 and $45 for different container types [2]. Group 3: Market Sentiment and Trends - The market sentiment remains pessimistic, with expectations of continued downward pressure on the shipping index due to oversupply and weak demand [2][3]. - The geopolitical situation has shown signs of easing, with reports of a ceasefire agreement between Iran and Israel, which may reduce the impact on the shipping market [2][3]. Group 4: Technical Analysis - The EC2508 contract is expected to face strong resistance above the 2000-point mark, with a bearish trend likely to persist in the short term [3]. - Key support levels for EC2508 are identified around 1800 points, with expectations for the EC2506 delivery price to be below 1850 points [3].