商品期权周报 I 2025/08/18—2025/08/22 隐波下降，市场震荡回落 本周摘要 波动率方面，截至本周五收盘，原油期权隐含波动率 28.91%,较 一周前下降-4.35%。碳酸锂期权隐含波动率 42.69%,较一周前下 降-5.54%。螺纹钢期权隐含波动率 11.35%,较一周前下降- 0.46%。纯碱期权隐含波动率 18.20%,较一周前下降-1.48%。黄 金期权隐含波动率 15.51%,较一周前下降-0.25%,较一周前下降- 1.48%。白银期权隐含波动率 18.06%,较一周前下降-0.21%。棕 榈油期权隐含波动率 15.61%,较一周前上升 0.14%。豆油期权隐 含波动率 21.60%,较一周前上升 2.06%。菜油期权隐含波动率 19.84%,较一周前下降-0.35%。橡胶期权隐含波动率 12.69%,较 一周前下降-2.85%。 本周商品期权成交量较上周大幅下降 24.45%，持仓量较上周下 降 24.29%。本周商品期权市场情绪较上周显著降温，期权隐含 波动率普遍下降。碳酸锂、纯碱期权隐含波动率较上周五下降均 超 4 个百分点，目前分别处于历史 60%-70%，30%-40 ...

Group 1: Implied Volatility Index and Its Calculation - The implied volatility index of financial options reflects the 30 - day implied volatility (IV) trend as of the previous trading day. The implied volatility index of commodity options is obtained by weighting the IV of the two strike - prices above and below the at - the - money option of the front - month contract, reflecting the IV change trend of the front - month contract [2] - The difference between the IV index and historical volatility (HV) indicates the relative level of IV to HV. A larger difference means higher IV relative to HV, and a smaller difference means lower IV relative to HV [2] Group 2: Implied Volatility and Historical Volatility Difference Graph - The document presents graphs showing the IV, HV, and IV - HV differences for various financial and commodity options, including 300 - stock index, 50ETF, 1000 - stock index, 500ETF, and many commodity options such as soybeans, corn, sugar, cotton, etc [3] Group 3: Implied Volatility Quantile and Volatility Spread Quantile Ranking - Implied volatility quantiles represent the current level of a variety's IV in history. A high quantile means the current IV is high, and a low quantile means the current IV is low. The volatility spread is calculated as the IV index minus the historical volatility [4] - The implied volatility quantile rankings are provided for different options, such as 50ETF with a quantile of 0.79, 300 - stock index with 0.80, iron ore with 0.37, PVC with 0.46, etc [5][7]

Key Points of the Report Core Concepts - The implied volatility index of financial options reflects the 30 - day implied volatility trend as of the previous trading day. The implied volatility index of commodity options is obtained by weighting the implied volatilities of the two - point - up and - down options at the at - the - money strike price of the main contract month, reflecting the implied volatility change trend of the main contract [2]. - The difference between the implied volatility index and historical volatility shows the relative level of implied volatility to historical volatility. A larger difference means the implied volatility is relatively higher, and a smaller difference means it is relatively lower [2]. - The implied volatility quantile represents the current implied volatility level of a variety in history. A high quantile means the current implied volatility is high, and a low quantile means it is low. The volatility spread is the implied volatility index minus the historical volatility [4]. Implied Volatility and Historical Volatility Data - The report presents the implied volatility (IV), historical volatility (HV), and their differences (IV - HV) of various options, including 300 Index, 50ETF, 1000 Index, 500ETF, and many commodity options such as soybean meal, corn, sugar, cotton, etc. [3] Implied Volatility Quantile and Volatility Spread Quantile Ranking - The report shows the ranking of implied volatility quantiles and historical volatility quantiles of different varieties, such as 300 Index, PVC, PTA, corn, etc. [4][5]

1. Report Industry Investment Rating No relevant content provided. 2. Core Viewpoints of the Report - In the past week, the trading volume of commodity options increased slightly, mainly due to the increment brought by the rising volatility of the agricultural products sector. Meanwhile, the trading volume of the non - ferrous and new energy sectors decreased along with the decline of implied volatility. The implied volatility of non - ferrous sector options is at a relatively low level recently, and buying options for price reversal trading can be considered [5]. - The options of contracts such as soybean meal, corn, starch, iron ore, liquefied gas, polypropylene, PVC, plastic, palm oil, soybean No.1, soybean No.2, soybean oil, styrene, ethylene glycol, eggs, live pigs, and log 509 are about to expire. Attention should be paid to the end - of - month risks when changing contracts [5]. 3. Summary According to the Table of Contents 3.1 Market Overview - The trading volume of commodity options increased slightly last week, mainly due to the increment from the agricultural products sector. The trading volume of non - ferrous and new energy sectors decreased, and their implied volatility also declined. The implied volatility of non - ferrous sector options is at a recent low [5]. - The options of certain contracts are about to expire, and attention should be paid to the end - of - month risks [5]. 3.2 Market Data 3.2.1 Market Overview - The trading volume of the overall market this week was 8,808,344.8, with a week - on - week increase of 0.17%. The open interest was 8,996,228, with a week - on - week decrease of 0.27%. Among them, the trading volume of the agricultural products sector increased by 2.45%, that of the energy and chemical sector increased by 0.17%, that of the black sector increased by 0.4%, and that of the precious metals sector increased by 1.26%. The trading volume of the non - ferrous and new energy sectors decreased by 1.82%. The open interest of the agricultural products sector decreased by 0.1%, that of the energy and chemical sector decreased by 0.55%, that of the black sector decreased by 0.19%, and that of the non - ferrous and new energy sectors increased by 0.41% [6]. 3.2.2 - 3.2.55 Various Option Market Data - For each type of option (such as corn, soybean meal, etc.), detailed data on trading volume, open interest, volume PCR, open interest PCR, at - the - money volatility, HV - 10 days, HV - 20 days, and Skew are provided, including data for this week, last week, and their changes [12 - 44]. 3.3 Chart Analysis No relevant content provided.

Group 1: Implied Volatility Index and Historical Volatility - The financial option implied volatility index reflects the 30 - day implied volatility (IV) trend as of the previous trading day. The commodity option implied volatility index is obtained by weighting the IV of the two - strike options around the at - the - money option of the front - month contract, reflecting the IV change trend of the front - month contract [3] - The difference between the IV index and historical volatility (HV) indicates the relative level of IV to HV. A larger difference means higher IV relative to HV, and a smaller difference means lower IV relative to HV [3] Group 2: Implied Volatility and Historical Volatility Graphs - The document presents graphs showing the IV, HV, and IV - HV differences for various financial and commodity options, including 300 - stock index, 50ETF, 1000 - stock index, 500ETF, and many commodity options such as silver, soybean meal, corn, etc [4] Group 3: Implied Volatility Quantile and Volatility Spread Quantile Ranking - Implied volatility quantile represents the current level of a variety's IV in history. A high quantile means the current IV is high, and a low quantile means the current IV is low. Volatility spread is the difference between the implied volatility index and historical volatility [5] - The document provides the implied volatility quantile rankings for different options, such as PVC with a quantile of 0.92, PTA with 0.39, etc [6]

1. Report Industry Investment Ratings - Cautiously bullish: Index futures, coking coal, coke, rubber [1][8][10] - Sideways pattern: Treasury bonds, gold, industrial silicon, steel (including rebar, hot - rolled coil, iron ore), soda ash, float glass, crude oil, methanol, polyolefins, cotton [1][4][6][8][10] - Bearish bias: Non - ferrous metals (copper, aluminum, nickel), lithium carbonate [4] - Bullish pattern for silver [4] 2. Core Viewpoints - The market has entered an observation period, and commodities may return to fundamental pricing. The risk appetite has cooled, but the long - term logic of anti - involution driving profit repair remains unchanged for A - shares, and the downside risk of the index is relatively controllable. For bonds, the macro - face turnaround needs further confirmation, and the short - term market fluctuates sharply. For precious metals, the short - term dollar rebound affects gold, but the long - term bullish logic for silver remains. For non - ferrous metals, although there are short - term impacts such as tariffs, the medium - to - long - term supply pattern varies by metal. For energy and chemical products, the supply and demand and market sentiment vary, with some facing supply - side constraints and others with demand - side uncertainties. For steel and building materials, the market has returned to fundamental pricing, and the supply - demand contradictions are different for each product. For agricultural products, the supply and demand situation affects the price trends, with some facing weakening upward momentum and others having certain demand support [1][4][6][8][10] 3. Summary by Related Catalogs Commodity Futures General - The market has shifted to an observation period, and commodities may return to fundamental pricing [1] Index Futures - Risk appetite has cooled, but the long - term logic of anti - involution driving profit repair for A - shares remains unchanged. The A - share profit bottom is emerging, and the market trading is still active. The downside risk of the index is relatively controllable [1] Treasury Bonds - The latest PMI data is below expectations, and the market optimism has weakened. The central bank has a net withdrawal in the open market, and the short - term market fluctuates sharply. The upward movement of the bond market needs further confirmation, and short - duration bonds perform relatively stably [1] Precious Metals - Gold: The US economy is cooling moderately, the Fed is not likely to cut interest rates in the short term, and the short - term dollar rebound drags down the gold price. However, the long - term bullish logic remains. - Silver: Although affected by short - term negative factors, the long - term bullish pattern remains, and the gold - silver ratio still has room for repair [4] Non - ferrous Metals - Copper: Trump's copper tariff measures have short - term impacts, but the medium - to - long - term supply of the mining end is still tight, and the COMEX - LME copper premium is expected to be quickly repaired. - Aluminum: The market has differences on the medium - term supply situation. The short - term price is affected by emotions, and the Shanghai aluminum has certain support below. - Nickel: The nickel market remains in an oversupply pattern, and the price is in a low - level sideways range [4] Energy and Chemical Products - Lithium carbonate: The fundamentals are still loose, but the supply - demand structure has marginally improved, and the price may stop falling and move sideways. - Industrial silicon: The market furnace - opening number has slightly increased, and the short - term upward momentum is limited under the short - term position limit. - Crude oil: There are uncertainties in the market before the sanctions are implemented, and the risk premium has increased. - Methanol: The production has increased, and if the production and arrival volume continue to rise in early August, the price may weaken. - Polyolefins: The demand off - season is coming to an end, and the price trend in August and September depends on demand. The tariff trend in early August is crucial [4][6][8][10] Steel and Building Materials - Rebar: The market has returned to fundamental pricing, the supply - demand contradiction is not prominent, and the price may be weakly sideways. - Hot - rolled coil: The supply - demand contradiction accumulates slowly, and the price may be weakly sideways after a rapid decline. - Iron ore: The anti - involution expectation trading is basically over, and it follows the sector's fluctuations. - Soda ash: The fundamental excess pattern remains, and the price is weakly sideways. - Float glass: The fundamentals are better than soda ash, but the demand is affected by the real - estate cycle, and the price is in a sideways pattern [6][8] Agricultural Products - Cotton: The supply - demand upward momentum has weakened, and the price is weakly running. - Rubber: The supply - demand is expected to increase, the short - term contradiction is not prominent, and the price downward driving force has weakened [10]

1. Report Industry Investment Rating - Not provided in the document 2. Core Viewpoints of the Report - The trading enthusiasm in the commodity options market has declined, with implied volatility falling along with trading volume. The actual volatility of most varieties remains at a relatively high level, and the decline rate of implied volatility is gradually slowing down. Additionally, the fluctuations in futures prices and the spread of hot - spot varieties have increased commodity arbitrage opportunities [5]. - The near - month options contracts of the Guangzhou Futures Exchange will expire on Thursday. The trading volume and open - interest ratios of the call options of the double - silicon varieties continue to increase, and the skew is also rising in a high - level oscillation. It is advisable to consider buying a bull spread portfolio for short - term speculation [5]. - The skew center of the black sector options has declined, and the implied volatility is at a high level, but the premium space compared with the actual volatility is limited. One can consider selling out - of - the - money call options and buying out - of - the - money put options for a skew regression arbitrage strategy, while paying attention to appropriate Delta - neutral hedging. The arbitrage space for rebar options is relatively large [5]. 3. Summary by Relevant Catalogs 3.1 Market Overview - The trading volume of the overall market decreased by 0.45%, while the open interest increased by 0.21%. Among different sectors, the trading volume of agricultural products increased by 0.68%, energy and chemical decreased by 0.19%, black decreased by 0.14%, precious metals decreased by 2.76%, and non - ferrous and new energy decreased by 0.98%. The open interest of agricultural products increased by 0.09%, energy and chemical increased by 0.29%, black increased by 0.21%, precious metals increased by 0.48%, and non - ferrous and new energy increased by 0.25% [6]. 3.2 Commodity - Specific Option Data - **Corn Options**: The trading volume and open interest of call and put options showed different changes. The implied volatility of at - the - money options decreased, and the skew also decreased [18][19]. - **Soybean Meal Options**: The trading volume decreased, while the open interest increased. The implied volatility of at - the - money options decreased, and the skew also decreased [20]. - **Rapeseed Meal Options**: The trading volume and open interest increased. The implied volatility of at - the - money options decreased, and the skew also decreased [22]. - **Palm Oil Options**: The trading volume and open interest increased. The implied volatility of at - the - money options decreased, and the skew decreased significantly [23]. - **Soybean Oil Options**: The trading volume and open interest showed mixed changes. The implied volatility of at - the - money options increased slightly, and the skew decreased [24]. - **Rapeseed Oil Options**: The trading volume decreased, and the open interest increased. The implied volatility of at - the - money options decreased, and the skew decreased [25]. - **Peanut Options**: The trading volume and open interest increased. The implied volatility of at - the - money options decreased slightly, and the skew increased [26]. - **Yellow Soybean No. 1 Options**: The trading volume decreased, and the open interest increased. The implied volatility of at - the - money options decreased, and the skew increased significantly [27]. - **Yellow Soybean No. 2 Options**: The trading volume and open interest increased. The implied volatility of at - the - money options decreased, and the skew increased [28]. - **Ethylene Glycol Options**: The trading volume decreased, and the open interest increased. The implied volatility of at - the - money options decreased significantly, and the skew decreased [29]. - **Styrene Options**: The trading volume decreased, and the open interest increased. The implied volatility of at - the - money options decreased significantly, and the skew decreased [30]. - **Sugar Options**: The trading volume and open interest increased. The implied volatility of at - the - money options decreased, and the skew decreased significantly [31]. - **Cotton Options**: The trading volume and open interest increased. The implied volatility of at - the - money options decreased significantly, and the skew decreased [32]. - **PTA Options**: The trading volume decreased, and the open interest increased. The implied volatility of at - the - money options decreased significantly, and the skew decreased [33]. - **PX Options**: The trading volume and open interest showed significant changes. The implied volatility of at - the - money options had some fluctuations, and the skew had some changes [34]. - **Caustic Soda Options**: The trading volume decreased, and the open interest increased. The implied volatility of at - the - money options decreased significantly, and the skew decreased [35]. - **Rubber Options**: The trading volume decreased, and the open interest increased slightly. The implied volatility of at - the - money options decreased significantly, and the skew decreased [36]. - **BR Rubber Options**: The trading volume decreased significantly, and the open interest increased. The implied volatility of at - the - money options decreased, and the skew decreased [37]. - **Polyethylene Options**: The trading volume decreased, and the open interest increased. The implied volatility of at - the - money options decreased, and the skew decreased [38]. - **Polypropylene Options**: The trading volume decreased, and the open interest increased. The implied volatility of at - the - money options decreased, and the skew decreased [39]. - **Methanol Options**: The trading volume decreased significantly, and the open interest increased. The implied volatility of at - the - money options decreased significantly, and the skew decreased [40]. - **Liquefied Petroleum Gas Options**: The trading volume decreased slightly, and the open interest increased. The implied volatility of at - the - money options decreased, and the skew decreased [41]. - **PVC Options**: The trading volume decreased, and the open interest increased. The implied volatility of at - the - money options decreased significantly, and the skew decreased [42]. - **Crude Oil Options**: The trading volume and open interest increased. The implied volatility of at - the - money options increased slightly, and the skew decreased [43]. - **Iron Ore Options**: The trading volume decreased, and the open interest increased. The implied volatility of at - the - money options decreased, and the skew decreased significantly [44].

Report Summary 1. Report Industry Investment Rating No relevant content provided. 2. Core Viewpoints - The energy and chemical sector is divided into energy, alcohols, polyolefins, rubber, polyesters, alkalis, and others [9]. - For each sub - sector, specific options strategies and suggestions are provided based on fundamental and market analysis of different underlying assets [9]. - The overall strategy is to construct option portfolio strategies mainly as sellers, along with spot hedging or covered strategies to enhance returns [3]. 3. Summary by Related Catalogs 3.1 Underlying Futures Market Overview - Various energy and chemical option underlying futures are presented, including details such as the latest price, change, change rate, trading volume, and open interest. For example, crude oil (SC2508) has a latest price of 532, a change of 18, and a change rate of 3.50% [4]. 3.2 Option Factors - Volume and Open Interest PCR - PCR indicators (volume PCR and open - interest PCR) are analyzed for different option varieties. These indicators are used to describe the strength of the option underlying market and potential turning points. For instance, the open - interest PCR of crude oil is 1.61 with a change of 0.39 [5]. 3.3 Option Factors - Pressure and Support Levels - Pressure and support levels for different option underlying assets are determined from the strike prices of the maximum open interest of call and put options. For example, the pressure level of crude oil is 560 and the support level is 450 [6]. 3.4 Option Factors - Implied Volatility - Implied volatility data (including at - the - money implied volatility, weighted implied volatility, etc.) are provided for each option variety. For example, the at - the - money implied volatility of crude oil is 41.58% [7]. 3.5 Strategy and Suggestions - **Crude Oil Options** - Fundamental analysis shows that US employment data is weak and geopolitical conflicts have increased the geopolitical premium of oil prices. The market has a short - term bullish upward trend. - Option factors indicate high implied volatility, strong long - term bullish power, with a pressure level of 560 and a support level of 450. - Strategies include constructing a bullish call spread for directional gains, a neutral short call + put option combination for time - value gains, and a long collar strategy for spot hedging [8]. - **Liquefied Petroleum Gas (LPG) Options** - Fundamental factors such as rising crude oil prices and increased summer oil consumption have affected the LPG market. The market shows an oversold rebound. - Option factors suggest that implied volatility fluctuates around the historical average, and the short - term bearish power is weakening, with a pressure level of 5200 and a support level of 4000. - Strategies include a neutral short call + put option combination and a long collar strategy for spot hedging [10]. - **Methanol Options** - Port inventory has increased, and the market shows a weak bearish oversold rebound. - Option factors indicate that implied volatility fluctuates around the historical average, and the bearish power above is weakening, with a pressure level of 2500 and a support level of 1975. - Strategies include a bullish call spread, a short call + put option combination with a long - biased delta, and a long collar strategy for spot hedging [10]. - **Ethylene Glycol Options** - Port inventory is expected to increase, and the market shows a short - term bullish rise followed by a decline. - Option factors suggest high implied volatility, a range - bound and relatively strong market, with a pressure level of 4500 and a support level of 4300. - Strategies include a short - volatility strategy and a long collar strategy for spot hedging [11]. - **Polyolefin Options (Polypropylene, etc.)** - Polypropylene downstream开工率 is low, and inventory levels vary. The market shows a rebound in a bearish trend. - Option factors indicate that implied volatility is above the historical average, and the open - interest PCR is below 1.00, with a pressure level of 7500 and a support level of 6800. - Strategies include a long collar strategy for spot hedging [11]. - **Rubber Options** - Overseas production is not at a high level, and tire inventory is high. The market shows a bearish downward rebound. - Option factors suggest that implied volatility fluctuates around the average, and the open - interest PCR is below 0.60, with a pressure level of 21000 and a support level of 13000. - Strategies include a bearish put spread, a short call + put option combination with a short - biased delta [12]. - **Polyester Options (PTA, etc.)** - PTA inventory shows a short - term slowdown in destocking. The market shows a high - level shock and decline. - Option factors indicate high implied volatility, a strengthening market, with a pressure level of 5000 and a support level of 3800. - Strategies include a neutral short call + put option combination [13]. - **Caustic Soda Options** - Production has decreased, and inventory has increased. The market shows a bearish downward trend. - Option factors suggest that implied volatility is below the average, and the open - interest PCR is below 0.60, with a pressure level of 2520 and a support level of 2080. - Strategies include a bearish put spread, a short wide - straddle option combination, and a covered spot hedging strategy [14]. - **Soda Ash Options** - The spot market is weak, and the market shows a bearish low - level consolidation. - Option factors indicate that implied volatility is below the historical average, and the open - interest PCR is below 0.50, with a pressure level of 1300 and a support level of 1100. - Strategies include a bearish put spread, a short call + put option combination with a short - biased delta, and a long collar strategy for spot hedging [14]. - **Urea Options** - Inventory has increased, and prices have declined. The market shows an inverted "V" shape. - Option factors suggest that implied volatility is below the average, and the open - interest PCR is above 1.00, with a pressure level of 1900 and a support level of 1700. - Strategies include a bearish put spread, a short call + put option combination with a short - biased delta, and a long collar strategy for spot hedging [15].

Group 1: Implied Volatility Index and Historical Volatility - The financial option implied volatility index reflects the 30 - day implied volatility trend as of the previous trading day. The commodity option implied volatility index is obtained by weighting the implied volatilities of the two - strike options above and below the at - the - money option of the main contract, reflecting the implied volatility change trend of the main contract [3] - The difference between the implied volatility index and historical volatility: a larger difference indicates that the implied volatility is relatively higher than the historical volatility, while a smaller difference means the opposite [3] Group 2: Implied Volatility and Historical Volatility Graphs - There are graphs showing the trends of implied volatility (IV), historical volatility (HV), and their differences (IV - HV) for various financial and commodity options, including 50ETF, 1000 - stock index, 500ETF, ES, Shanghai Gold, corn, soybean meal, sugar, cotton, rubber, PTA, methanol, iron ore, crude oil, aluminum, zinc, urea, palm oil, rapeseed meal, Shanghai copper, PVC, and rebar [4][6][7][8][9][10][11][12][13][14][15] Group 3: Implied Volatility and Historical Volatility Quantiles - Implied volatility quantiles represent the current implied volatility level of a variety in history. A high quantile means the current implied volatility is high, and a low quantile means it is low [17] - The implied volatility quantile rankings are as follows: PTA (0.78), natural rubber (0.70), etc. [18] - The historical volatility quantile rankings are as follows: PTA (0.94), 50ETF (0.87), etc. [19]

1. Report Industry Investment Rating - Not provided in the document 2. Core Viewpoints of the Report - The report analyzes the fundamentals, market trends, and volatility of various energy and chemical options, and provides corresponding strategy recommendations [3] 3. Summary by Relevant Catalogs 3.1 Energy and Chemical Option Classification - Energy and chemical options are mainly divided into five categories: basic chemicals, energy, polyester chemicals, polyolefin chemicals, and other chemicals [3] 3.2 Basic Chemicals Sector - **Methanol Options**: The price is under pressure and shows a weak and bearish trend. Implied volatility is above the historical average. A bearish combination strategy of call + put options is recommended [3] - **Rubber Options/Synthetic Rubber Options**: The market shows a weak consolidation and oscillation pattern under bearish pressure. Implied volatility is at a relatively high historical level. A bearish volatility - selling strategy is recommended [3] - **Styrene Options**: Affected by the Sino - US tariff war, downstream demand is weak. The market shows a large - fluctuation and weak trend. Implied volatility remains at a relatively high historical level. A volatility - selling option combination strategy is recommended [4] 3.3 Oil and Gas Sector - **Crude Oil Options**: OPEC+ increases supply, but exports do not increase significantly. The market shows a large - fluctuation pattern under bearish pressure. Implied volatility remains at a relatively high level. A volatility - selling strategy is recommended [4] - **Liquefied Gas Options**: The price has a short - term weak rebound under pressure. Implied volatility is above the historical average. A bearish call + put option combination strategy is recommended, and the position delta should be adjusted dynamically [4] 3.4 Polyester Chemicals Sector - **PX Options/PTA Options**: PTA load is decreasing, and inventory is decreasing year - on - year. The market shows a mild bullish trend under bearish pressure. Implied volatility remains at a relatively high level. A volatility - selling strategy is recommended [5] - **Ethylene Glycol Options**: Port inventory is increasing, and downstream inventory days are rising. The market shows a large - oscillation and short - term weak bearish trend. Implied volatility has risen rapidly to a relatively high historical level. A volatility - selling strategy is recommended [5] - **Short - Fiber Options**: Polyester load is high, but short - fiber load is slightly decreasing. The market shows a rebound pattern under bearish pressure. Implied volatility remains at a relatively high average level. A volatility - selling call + put option combination strategy is recommended [5] 3.5 Polyolefin Chemicals Sector - **Polypropylene Options**: Inventory shows different trends among producers, traders, and ports. The market shows a large - oscillation and weak pattern. Implied volatility is at a relatively high historical level. A bearish call + put option combination strategy is recommended, and the position delta should be adjusted dynamically [6] - **Polyethylene Options**: Producer and trader inventories are increasing. The market shows a weak consolidation pattern under pressure. Implied volatility has risen rapidly to a relatively high level. A bearish directional strategy is recommended [6] - **PVC Options**: Factory and social inventories are decreasing year - on - year. The market shows a weak bearish downward trend. Implied volatility remains at a relatively low level. A bearish directional strategy is recommended [6] 3.6 Data Summary - **Option Underlying Market Data**: Includes closing prices, price changes, trading volumes, and open interest of various option underlying assets [8] - **Option Volume, Open Interest, and Turnover Data**: Volume, open interest, and turnover data of various options, as well as their changes [9] - **Option Volume, Open Interest, and Turnover PCR Data**: PCR data and their changes of various options [10] - **Option Maximum Open Interest at Strike Prices**: Maximum open interest at strike prices, pressure points, and support points of various options [11] - **Option Implied Volatility Data**: Implied volatility, its changes, annual average, call and put implied volatilities, and historical volatility of various options [13]