债 券 研 究 年末"期-现"波动的新特征和应对 [Table_Authors] 唐元懋(分析师) 本报告导读： 2025 年末，国债期货出现不同于往年的高波动行情，在此情况下可以考虑套保策略 或反向博弈两种应对方式。 投资要点： 债券研究 /[Table_Date] 2026.01.04 | | | 0755-23976753 | | --- | --- | --- | | | tangyuanmao@gtht.com | | | 登记编号 | S0880524040002 | | | | 孙越(分析师) | | | | 021-38031033 | | | | sunyue6@gtht.com | | | 登记编号 | | S0880525080004 | [Table_Report] 相关报告 曲径分岔：政策分化中把握中久期良机 2026.01.03 回望 25 年，高弹性强动量占优 2026.01.02 利率互换 IRS 能预测资金松紧甚至降息吗？ 2025.12.31 关注信用债 3Y-1Y 的骑乘机会 2025.12.29 银行二永债周度数据库更新（2025.12.19-12.26） 2025.1 ...

Report Summary 1. Report Industry Investment Rating No relevant information provided. 2. Core Viewpoints - The pure benzene market is expected to face a situation of increasing supply and decreasing demand, with weak fundamentals and difficulty in inventory reduction. Without macro - level positive factors, its price is likely to fluctuate weakly. The styrene market has seen a reduction in supply in September due to increased maintenance, but faces challenges such as high inventory, slow terminal order recovery, and weak confidence in the peak season. The absolute prices of both pure benzene and styrene are at historical lows, showing undervaluation but high inventory. Short - term market is expected to be volatile, and it is advisable to adopt a wait - and - see approach [4]. 3. Summary by Related Contents Price Forecast and Hedging Strategies - **Price Forecast**: The monthly price range for pure benzene is predicted to be 5600 - 6200 yuan/ton, and for styrene, it is 6800 - 7400 yuan/ton. The current 20 - day rolling volatility of styrene is 29.40%, and its historical percentile over 3 years is 85.8% [3]. - **Hedging Strategies**: - **Inventory Management**: For enterprises with high finished - product inventory, they can short styrene futures (EB2510, sell, 25%, entry range: 7300 - 7400 yuan/ton) to lock in profits and sell call options (EB2510C7200, sell, 50%, entry range: 15 - 30) to reduce capital costs [3]. - **Procurement Management**: For enterprises with low procurement inventory, they can buy styrene futures (EB2510, buy, 50%, entry range: 6900 - 7000 yuan/ton) to lock in procurement costs and sell put options (EB2510P7000, sell, 75%, entry range: 35 - 50) to reduce procurement costs [3]. Market Situation Analysis - **Core Contradictions**: Pure benzene has an unfavorable supply - demand situation, and styrene has issues such as high inventory and slow terminal order recovery. Both markets need macro - level policies or unplanned production cuts to change the situation [4]. - **Leveraging Factors**: No relevant information provided. - **Negative Factors**: - The price of crude oil, a cost - end factor, has weakened significantly due to production - increase news [6]. - New production capacity of pure benzene is being added, while downstream demand is decreasing. For example, a 23 - ton pure benzene cracking unit in Shandong will be put into production in mid - September, and a 9 - ton pure benzene reforming unit in Hebei is planned to be put into production at the end of September. There are also new styrene production units coming online, and the monthly production schedule of major white goods is not optimistic [9]. Market Data - **Inventory**: As of September 8, 2025, the styrene port inventory in Jiangsu was 17.65 tons, a decrease of 2 tons (- 10.18%) from the previous period, mainly due to fewer arriving ships in the previous period [8]. - **Basis and Spread**: The report provides detailed data on the daily changes in the basis of pure benzene and styrene, as well as the price spreads within the pure benzene - styrene industrial chain [10][11]. - **Industrial Chain Prices**: It shows the price data of various products in the pure benzene - styrene industrial chain from September 5 to September 12, 2025, including crude oil, naphtha, pure benzene, styrene, and their downstream products, as well as the profit data of some products [12][13].

Summary of Key Points from the Conference Call Industry Overview - The conference call focuses on the **government bond futures** market in China, detailing the mechanics, strategies, and key indicators relevant to trading in this sector. Key Points and Arguments 1. **Contract Specifications**: Government bond futures are categorized into four types based on maturity: 2-year (200 million RMB), 5-year, 10-year, and 30-year (100 million RMB). Daily price fluctuation limits are set at ±0.5%, ±1.2%, ±2%, and ±3.5% respectively [1][4]. 2. **Pricing Mechanism**: There is a reciprocal pricing relationship between the government bond spot market and the futures market. Technical analysis can predict trends and inform spot market transactions [5]. 3. **Key Indicators**: Important indicators include the main contract, cheapest to deliver (CTD) conversion factor, basis, net basis, bank repurchase rate, trading volume, and open interest. These indicators help assess market activity and identify arbitrage opportunities [8][9]. 4. **Basis and Net Basis**: The basis is defined as the difference between the spot price and the futures price adjusted by the conversion factor. A positive basis indicates futures are at a discount, while a negative basis indicates a premium. The net basis accounts for holding period returns, providing a clearer picture of investment profitability [3][13]. 5. **Trading Strategies**: Common strategies include speculation, hedging, and arbitrage. Hedging is primarily used by institutions like funds and banks to mitigate interest rate risk [27][28]. 6. **CTD and Conversion Factor**: The CTD is the least expensive bond that can be delivered under a futures contract. The conversion factor standardizes different bonds to a nominal rate of 3% for valuation purposes [11][12]. 7. **Market Sentiment Analysis**: Market sentiment can be gauged through open interest and trading volume. An increase in long positions may indicate bullish sentiment, while an increase in short positions may suggest bearish sentiment [16][26]. 8. **Arbitrage Opportunities**: Arbitrage strategies include basis arbitrage, curve arbitrage, inter-period arbitrage, and cross-product arbitrage. These strategies exploit price discrepancies between futures and spot markets [33][36]. 9. **Impact of Bank Repo Rate**: The bank repurchase rate is crucial for determining the profitability of a positive spread trading strategy, influencing both funding costs and overall returns [14][15]. 10. **Settlement Price Calculation**: The settlement price is derived from a weighted average of transaction prices and volumes throughout the trading day [17]. Additional Important Content - **Contract Rollovers**: The main contract typically undergoes a rollover process around the 18th to 20th of the month prior to expiration, affecting liquidity and trading volume [9]. - **Minimum Trading Margin**: The minimum trading margin varies by contract type, influencing leverage ratios. For instance, the 2-year contract requires a margin of 0.5% of the contract value [4]. - **Market Behavior Indicators**: Observing the nature of trades (opening vs. closing positions) can provide insights into market trends and potential price movements [22][24]. This summary encapsulates the essential aspects of the government bond futures market as discussed in the conference call, providing a comprehensive overview for potential investors and market participants.

1. Report Industry Investment Rating - Not provided in the documents 2. Core Viewpoints of the Report - The current situation is characterized by weak reality and strong expectations, with policy expectations yet to be disproven, and there is a contradiction between macro - expectations and industrial logic [2] - Bullish factors include anti - involution expectations, rising coal costs, commodity resonance, and the upward movement of the futures market stimulating speculative demand and driving a positive feedback between futures and spot prices [2] - Bearish factors are that the medium - to - long - term fundamentals have not improved [2] - Policy expectations persist, and the futures market remains strong. Attention should be paid to the amplitude of the resonance between the macro and industrial sectors and wait for the next policy guidance [2] 3. Summary by Related Content Glass and Soda Ash Price Forecast - The monthly price forecast for glass is in the range of 1200 - 1500, with a current 20 - day rolling volatility of 51.76% and a 3 - year historical percentile of 97.8%. The monthly price forecast for soda ash is in the range of 1200 - 1600, with a current 20 - day rolling volatility of 39.03% and a 3 - year historical percentile of 75.6% [1] Glass and Soda Ash Hedging Strategies Glass - **Inventory Management**: When the finished - product inventory is high and there are concerns about falling glass prices, short glass futures (FG2509) with a 25% hedging ratio at 1500 and sell call options (FG509C1500) with a 50% hedging ratio at 50 - 60 to lock in profits and reduce costs. When the procurement inventory is low and there are concerns about rising glass prices, buy glass futures (FG2509) with a 25% hedging ratio at 1200 and sell put options (FG509P1200) with a 50% hedging ratio at 30 - 50 to lock in procurement costs [1] Soda Ash - **Inventory Management**: When the finished - product inventory is high and there are concerns about falling soda ash prices, short soda ash futures (SA2509) with a 25% hedging ratio at 1600 and sell call options (SA509C1600) with a 50% hedging ratio at 40 - 60. When the procurement inventory is low and there are concerns about rising soda ash prices, buy soda ash futures (SA2509) with a 25% hedging ratio at 1200 - 1250 and sell put options (SA509P1300) with a 50% hedging ratio at 30 - 50 [1] Glass Futures Prices and Spreads - On July 25, 2025, the prices of glass 05, 09, and 01 contracts were 1461, 1362, and 1426 respectively, with daily increases of 1.67%, 4.21%, and 1.71%. The spreads (5 - 9), (9 - 1), and (1 - 5) were 99, - 64, and - 35 respectively, with the (5 - 9) spread decreasing by 31 and the (9 - 1) spread increasing by 31 [2] Glass Spot Prices - On July 25, 2025, the average price of glass in Shahe was 1289.4, an increase of 52.6 from the previous day. The prices in different regions also showed varying degrees of increase, such as a 30 increase in North China and a 10 increase in South China [5] Soda Ash Futures Prices and Spreads - On July 25, 2025, the prices of soda ash 05, 09, and 01 contracts were 1539, 1440, and 1516 respectively, with daily increases of 1.38%, 2.27%, and 2.09%. The spreads (5 - 9), (9 - 1), and (1 - 5) were 99, - 76, and - 23 respectively, with varying degrees of change [6] Soda Ash Spot Prices - On July 25, 2025, the prices of heavy soda ash and light soda ash in different regions all increased to varying degrees, such as a 50 increase in North China and a 70 increase in East China [7] Seasonal Data - There are seasonal data on the daily output of float glass in China, the daily melting volume of photovoltaic glass in China, the capacity utilization rate of soda ash in China, and the loss volume of soda ash in China, as well as the seasonal data of the basis of glass and soda ash contracts in different regions and the seasonal data of the daily sales - to - production ratio of glass in different regions [8][23][28]

Group 1: Report Summary - The report predicts the price range of polypropylene (PP) for the month to be between 6,800 and 7,100 yuan/ton, with a current 20 - day rolling volatility of 9.93% and a historical percentile of 13.3% over 3 years [1] - It provides hedging strategies for inventory and procurement management, including using futures and options contracts [1] - The core contradiction is that the PP market is in a supply - strong and demand - weak pattern, limiting its upward space. The supply pressure is high due to expected decline in planned maintenance and upcoming new installations, while demand is weak due to the traditional off - season and poor downstream profits [2] - There are some利多 factors such as high - level ongoing device maintenance leading to marginal supply reduction and the current low - level of the market limiting its downward space [3] - There are also利空 factors including new installations during the Dragon Boat Festival and more in 6 - 8 months, a decline in exports after the seasonal peak, and weak domestic demand due to the off - season and poor profits [4] Group 2: Price and Spread Data Futures Prices and Spreads - The polypropylene main basis on 2025 - 06 - 10 was 139 yuan/ton, with a daily change of 21 yuan/ton and a weekly change of - 27 yuan/ton. PP01, PP05, and PP09 contracts also had corresponding price changes [1][5] - The PP1 - 5, PP5 - 9, and PP9 - 1 month spreads had specific values and daily/weekly changes [5] Spot Prices and Regional Spreads - Spot prices in North China, East China, and South China showed different changes on 2025 - 06 - 10 compared to previous days, and regional spreads also changed [7] Non - standard and Standard Product Spreads - Spreads between different non - standard and standard PP products (e.g., homopolymer injection - molding to wire - drawing) had various daily and weekly changes [7] Upstream Prices and Processing Profits - Brent crude oil price, US propane price, Northwest coal price, and East China methanol price had different changes. Different PP production methods (oil - based, coal - based, etc.) had corresponding profit changes [7]