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永安期货焦炭日报-20250905
Yong An Qi Huo· 2025-09-05 01:51
焦炭日报 研究中心黑色团队 2025/9/5 | | 最新 | 日变化 | 周变化 | 月变化 同比 | | 最新 | 日变化 | 周变化 | 月变化 同比 | | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 山西准一湿熄 | 1535.94 | 0.00 | 0.00 | 109.23 | -2.82% 高炉开工率 | 90.02 | | -0.23 | -0.22 | 6.79% | | 河北准一湿熄 | 1780.00 | 0.00 | 0.00 | 130.00 | -1.39% 铁水日均产量 | 228.84 | | -11.29 | -11.48 | 2.80% | | 山东准一干熄 | 1715.00 | 0.00 | 0.00 | 110.00 | -7.05% 盘面05 | 1668.5 | -27.00 | -76.50 | -143.00 | -15.33% | | 江苏准一干熄 | 1755.00 | 0.00 | 0.00 | 110.00 | -6.90% 盘面09 | 1449.5 | ...
焦炭板块9月4日涨0.42%,安泰集团领涨,主力资金净流出5136.67万元
Group 1 - The coke sector experienced a slight increase of 0.42% on September 4, with Antai Group leading the gains [1] - The Shanghai Composite Index closed at 3765.88, down 1.25%, while the Shenzhen Component Index closed at 12118.7, down 2.83% [1] - Key stocks in the coke sector showed varied performance, with Antai Group closing at 2.19, up 1.39%, and other companies like Yunmei Energy and Shaanxi Black Cat also showing positive changes [1] Group 2 - The net capital flow in the coke sector indicated a net outflow of 51.37 million yuan from main funds, while retail investors saw a net inflow of 59.73 million yuan [1] - Individual stock performances in terms of capital flow showed that Yunmei Energy had a net outflow of 1.62 million yuan from main funds, while retail investors contributed a net inflow of 2.97 million yuan [2] - Antai Group experienced a significant net outflow of 7.45 million yuan from main funds, but retail investors added 8.35 million yuan [2]
焦炭板块9月3日跌2.81%,云维股份领跌,主力资金净流出7380.78万元
Market Overview - The coking coal sector experienced a decline of 2.81% on September 3, with Yunwei Co. leading the drop [1] - The Shanghai Composite Index closed at 3813.56, down 1.16%, while the Shenzhen Component Index closed at 12472.0, down 0.65% [1] Individual Stock Performance - Shaanxi Black Cat (601015) closed at 3.46, down 1.70% with a trading volume of 259,800 shares and a turnover of 91.44 million yuan [1] - Shanxi Coking Coal (600740) closed at 3.86, down 1.78% with a trading volume of 174,800 shares and a turnover of 67.95 million yuan [1] - Yunmei Energy (600792) closed at 3.77, down 2.08% with a trading volume of 108,600 shares and a turnover of 41.39 million yuan [1] - Baotailong (601011) closed at 2.78, down 2.46% with a trading volume of 416,300 shares and a turnover of 117 million yuan [1] - Meijin Energy (000723) closed at 4.67, down 3.31% with a trading volume of 620,800 shares and a turnover of 294 million yuan [1] - Antai Group (600408) closed at 2.16, down 3.57% with a trading volume of 239,400 shares and a turnover of 52.65 million yuan [1] - Yunwei Co. (600725) closed at 3.43, down 5.25% with a trading volume of 425,800 shares and a turnover of 148.17 million yuan [1] Capital Flow Analysis - The coking coal sector saw a net outflow of 73.81 million yuan from main funds, while retail funds had a net inflow of 65.53 million yuan [1] - Main funds showed significant outflows in several stocks, with Meijin Energy experiencing a net outflow of 40.58 million yuan [2] - Yunwei Co. had a net outflow of 25.91 million yuan from main funds, but a net inflow of 20.46 million yuan from retail investors [2]
广发期货《黑色》日报-20250903
Guang Fa Qi Huo· 2025-09-03 05:32
Report Industry Investment Rating No relevant content provided. Core Viewpoints - For the steel industry, prices have fallen from their highs, with significant declines in steel profits. There are expectations of seasonal demand improvement from September to October, but high production levels still pose a challenge to the demand - absorbing capacity during the peak season. Attention should be paid to coal mine复产 after the September 3rd parade and steel demand during the peak season. Investment strategies include selling out - of - the - money put options and considering long positions in the steel - iron ore ratio [1]. - Regarding the iron ore industry, the current fundamentals lack a strong upward driver. Although the iron water output may decline slightly around the parade, it will remain at a relatively high level in September. The demand during the "Golden September and Silver October" period is uncertain. The strategy is to view it as a range - bound market, with the range reference of 750 - 810, and recommend the arbitrage strategy of long iron ore and short coking coal [3][4]. - In the coke industry, the futures market has shown volatile and downward trends. The supply will gradually become looser after the end of short - term production restrictions, and there is a possibility of price decline in the future. It is recommended to hold previous short positions and consider the arbitrage strategy of long iron ore and short coke [5]. - For the coking coal industry, the futures market is oscillating weakly. The supply - demand situation has eased, and prices may continue to fall in September. It is recommended to hold previous short positions and consider the arbitrage strategy of long iron ore and short coking coal [5]. Summary by Related Catalogs Steel Industry Steel Prices and Spreads - Most steel prices have declined, with the exception of some contracts and regions where prices remained unchanged. For example, the spot price of rebar in the East China region dropped by 10 yuan/ton, and the price of the rebar 10 - contract increased by 8 yuan/ton [1]. Cost and Profit - The cost of steel production has generally decreased, while profits have declined significantly. For instance, the cost of Jiangsu electric - arc furnace rebar decreased by 36 yuan/ton, and the profit of East China hot - rolled coils decreased by 33 yuan/ton [1]. Production and Inventory - The daily average iron water output decreased by 0.7 tons (- 0.3%), while the output of five major steel products increased by 0.7%. The inventory of five major steel products increased by 1.9%, with the rebar inventory rising by 2.7% [1]. Market Analysis - In August, the supply - demand gap widened, and inventory accumulation was obvious. Entering September - October, there are expectations of seasonal demand improvement. However, high production levels still test the demand - absorbing capacity during the peak season [1]. Iron Ore Industry Price and Spread - The basis of most iron ore varieties has increased significantly, and the 5 - 9 spread has widened. For example, the 01 - contract basis of PB powder increased by 32.2 yuan/ton (351.5%) [3]. Supply and Demand - The global iron ore shipment volume increased by 7.3% week - on - week, and the 45 - port arrival volume increased by 5.5%. The demand side saw a decline in iron water output and a decrease in the average daily port clearance volume [3]. Inventory - The 45 - port inventory increased slightly by 0.1%, while the inventory of imported iron ore in 247 steel mills decreased by 0.6% [3]. Market Analysis - The fundamentals currently lack a strong upward driver. Although the iron water output may decline slightly around the parade, it will remain at a relatively high level in September. The demand during the "Golden September and Silver October" period is uncertain [3]. Coke and Coking Coal Industry Price and Spread - Coke and coking coal prices have shown different trends. Coke futures prices have fluctuated and declined, while coking coal futures prices have oscillated weakly. The spreads between different contracts have also changed [5]. Profit - Coking profits and sample coal mine profits have both decreased. The weekly coking profit decreased by 11, and the weekly sample coal mine profit decreased by 4 [5]. Supply and Demand - Coke supply has decreased due to production restrictions, and demand has also declined with the decrease in iron water output. Coking coal supply has been affected by mine accidents and production suspension, and demand has decreased due to steel and coking production restrictions [5]. Inventory - Coke and coking coal inventories have shown different trends. Coke inventories have increased slightly overall, while coking coal inventories have decreased slightly in some sectors and increased in others [5]. Market Analysis - Coke supply will gradually become looser after the end of short - term production restrictions, and there is a possibility of price decline. Coking coal supply - demand has eased, and prices may continue to fall in September [5].
焦炭:主流焦化厂第七轮提涨落地 焦化利润继续修复 第八轮提涨遇阻
Jin Tou Wang· 2025-09-03 02:11
Core Viewpoint - The recent fluctuations in coking coal futures indicate a volatile market, with supply tightening and demand showing signs of decline, leading to potential price adjustments in the near future [6] Supply - As of August 28, the average daily coking coal production from independent coking plants was 645,000 tons, a week-on-week decrease of 0.9% [3] - The total daily coking coal production from 247 steel mills was 461,000 tons, down by 0.6% week-on-week, resulting in a total production of 1,106,000 tons, which is a 1.6% decrease from the previous week [3] Demand - The average daily pig iron production was 2,401,300 tons as of August 28, reflecting a decrease of 620 tons week-on-week [4] - The blast furnace operating rate was 83.20%, down by 0.16% week-on-week, while the iron-making capacity utilization rate was 90.02%, a decrease of 0.23% [4] - The profitability of steel mills was reported at 63.64%, down by 1.30% week-on-week [4] Inventory - As of August 28, the total coking coal inventory was 9.44 million tons, with a week-on-week increase of 15,000 tons [5] - The inventory at independent coking plants was 653,000 tons, up by 9,000 tons week-on-week, while the inventory at 247 steel mills was 6.101 million tons, an increase of 5,000 tons [5] - Port inventory stood at 2.687 million tons, with a slight increase of 1,000 tons week-on-week [5] Price Movements - The main coking coal futures contract closed at 1,596.5, up by 2.0 (+0.13%), while the far-month contract closed at 1,689.0, down by 2.0 (-0.12%) [1] - The seventh round of price increases for coking coal was implemented at 50/55 yuan/ton, with the price for premium coking coal in Shanxi at 1,340 yuan/ton [1][6] - The eighth round of price increases faced resistance, with a steel plant in Ningxia reducing prices [1][6] Market Outlook - The market is expected to experience price adjustments due to improved coking profits and the gradual easing of production restrictions, leading to a potential increase in supply [6] - The steel industry is implementing strategies to control total production, which may negatively impact coal and coking coal demand [6]
反内卷:157个细分行业供给侧全景
2025-09-02 14:41
Summary of Conference Call Notes Industry Overview - The conference call discusses the supply-side reform across various industries, highlighting a slower capacity reduction compared to previous reforms. The overall capacity and inventory cycles for non-financial enterprises in the second quarter remain at the bottom, indicating a need for time and policy accumulation for recovery [3][4]. Key Points and Arguments - **Supply Capacity Assessment**: Analysts evaluate supply capacity using three dimensions: current supply capacity (capacity utilization rate and inventory), future supply changes (expansionary capital expenditure), and industry profitability (gross margin and proportion of loss-making enterprises) [4][5]. - **Manufacturing Sector**: - Industries such as construction, chemicals, and coke are categorized as "three lows" (low capacity utilization, low inventory, low expansionary capital expenditure), indicating low production willingness and limited future production capacity, accelerating capacity clearance [6]. - In contrast, cyclical products like textile chemicals, glass fiber, and fluorochemicals show profit growth, particularly fluorochemicals [6]. - Manufacturing areas like inverters, silicon materials, and silicon wafers are performing well, while lithium batteries and photovoltaic cell components are at the left-side bottom [6]. - **Consumer Goods Sector**: Chemical pharmaceuticals and clothing/home textiles are performing well, while traditional Chinese medicine is positioned in the middle to later stages of the left side [6]. - **TMT Sector**: Electronic chemicals, integrated circuit manufacturing, and security equipment are in relatively good positions, with no observed left-side bottom industries [2][6]. Additional Important Insights - The current supply-side framework is based on listed company data, reflecting the latest industry conditions as of the second quarter. The introduction of anti-involution policies has led to some positive factors across industries, but the overall situation remains at the bottom, requiring further time and policy efforts for noticeable changes [3]. - The assessment of supply capacity includes measuring capacity utilization through fixed asset turnover ratios and inventory through cumulative year-on-year comparisons over the past decade [4][5]. - Continuous tracking of data across different sectors is essential for making accurate judgments regarding potential investment opportunities and risks [6].
焦炭板块9月2日跌1.04%,美锦能源领跌,主力资金净流出1.15亿元
Group 1 - The coke sector experienced a decline of 1.04% on September 2, with Meijin Energy leading the drop [1] - The Shanghai Composite Index closed at 3858.13, down 0.45%, while the Shenzhen Component Index closed at 12553.84, down 2.14% [1] - Major stocks in the coke sector showed mixed performance, with Antai Group increasing by 0.90% and Meijin Energy decreasing by 2.03% [1] Group 2 - The net outflow of main funds in the coke sector was 115 million yuan, while retail investors saw a net inflow of 107 million yuan [1] - Detailed fund flow data indicates that Meijin Energy had a significant net outflow of 64.06 million yuan from main funds [2] - Retail investors showed a strong interest in several stocks, with Antai Group and Yunwei Co. seeing positive net inflows from retail investors [2]
中国旭阳集团“再出发”:有序扩产激发内生动力 外延式布局加速全球进击
Zhi Tong Cai Jing· 2025-09-02 08:14
Core Viewpoint - The report highlights that Xuyang Group is successfully navigating through an industry adjustment period while achieving resilient growth and business integration, marking a critical transition point as it approaches its seventh five-year development plan for 2026-2030 [1][2]. Financial Performance - In the first half of 2025, Xuyang Group reported a revenue of 20.549 billion yuan, with a gross profit of 1.686 billion yuan, resulting in a gross margin of 8.2% and a net profit of 86.908 million yuan [3]. - The fine chemicals segment generated a revenue of 9.096 billion yuan, accounting for 44.3% of total revenue, while the coke and coking segment reported a revenue of 6.358 billion yuan [3]. Business Segments Growth - The fine chemicals segment experienced a business volume of 2.9 million tons, up 11.5% year-on-year, while the coke segment's business volume reached 10.9 million tons, increasing by 25.3% [1]. - The hydrogen energy segment reported a business volume of 1.11 million cubic meters, reflecting a year-on-year growth of 16.8% [1]. Strategic Initiatives - Xuyang Group successfully acquired a controlling stake in Yihua Tong, marking the largest transaction in the hydrogen energy sector in recent years, and is progressing towards building a hydrogen energy ecosystem worth 10 billion yuan [1]. - The company has established a presence in Brazil and is preparing to set up trading offices in Europe, expanding its international footprint with 11 subsidiaries or offices across 41 countries and regions [2]. Future Outlook - The company is set to launch its seventh five-year development plan in 2026, with a clear path for future growth driven by acquisitions, external collaborations, and global market expansion [2][7]. - Upcoming projects include a 50,000-ton/year high-end polyamide new materials project expected to commence production in October 2025, alongside ongoing research into high-value fine chemical products [7]. Hydrogen Energy Development - Xuyang Group is actively involved in hydrogen industrialization projects in various regions and has completed the necessary licensing for hazardous chemicals, enhancing its competitive edge [4]. - The company is developing a 5-ton/day liquid hydrogen demonstration project, which is expected to be completed next year, positioning it as a leader in the domestic liquid hydrogen market [4][9]. Innovation and Product Development - The company has successfully built and put into operation the first domestic industrial-scale amino alcohol production facility, becoming the second company globally to produce amino alcohols industrially [5]. - The amino alcohols produced are widely applicable in various industries, with prices ranging from 60 to 150 yuan per kilogram based on purity, indicating high added value [5][6].
广发期货日评-20250902
Guang Fa Qi Huo· 2025-09-02 07:59
Report Summary 1. Investment Ratings The document does not provide an overall industry investment rating. 2. Core Views - The direction of monetary policy in the second half of 2025 is crucial for the equity market. After a significant increase in A-shares, they may enter a high-level shock pattern [2]. - In the short term, the 10-year treasury bond interest rate may fluctuate between 1.75% - 1.8%. Gold shows a strong shock trend, and copper prices are rising due to improved interest rate cut expectations [2]. - Many commodities such as steel, iron ore, coking coal, and coke are facing price - related challenges. Some suggest strategies like long steel - to - ore ratio and shorting at high prices [2]. 3. Summary by Categories Financial Futures - **Stock Index Futures**: After a large increase in A - shares, they may enter a high - level shock pattern. It is recommended to wait for the next direction decision [2]. - **Treasury Bond Futures**: The 10 - year treasury bond interest rate may fluctuate between 1.75% - 1.8%. It is recommended to use range - bound operations for unilateral strategies and pay attention to the basis convergence strategy of TL contracts for spot - futures strategies [2]. - **Precious Metals**: Gold is strongly fluctuating. It is advisable to be cautious when chasing long positions unilaterally. Buying at - the - money or in - the - money call options can be considered. Silver is affected by news and shows an upward shock [2][3]. Industrial Metals - **Copper**: Due to the improvement of interest rate cut expectations, the center of copper prices has risen, with the main contract reference range of 78500 - 80500 [2]. - **Aluminum and Related Products**: Aluminum oxide has a surplus pressure, and the disk is in a weak shock. Aluminum is in a high - level shock, and attention should be paid to whether the peak - season demand can be fulfilled. Aluminum alloy has a firm spot price [2]. - **Other Metals**: Nickel has an upward shock trend, and stainless steel has a strong disk due to improved spot trading, with cost support and weak demand in a game [3]. Energy and Chemicals - **Crude Oil**: Supported by geopolitical and supply risks, oil prices have rebounded. It is recommended to wait and see unilaterally in the short term and use a positive - spread strategy for arbitrage [2]. - **Other Chemicals**: Many chemicals have different market situations. For example, ethylene glycol is expected to have limited downward space, while PVC is in a weakening trend [2]. Agricultural Products - **Grains and Oils**: Corn futures are in a rebound adjustment, and palm oil may rise in the short term [2]. - **Other Agricultural Products**: Sugar has a relatively loose overseas supply outlook, and eggs have a weak peak - season performance [2]. Special and New Energy Commodities - **Special Commodities**: Glass has a high inventory, and it is recommended to short at high prices. Rubber has a strong fundamental situation and is in a high - level shock [2]. - **New Energy Commodities**: Polysilicon has risen significantly due to news stimulation, and lithium carbonate is in a wait - and - see state [2].
《黑色》日报-20250902
Guang Fa Qi Huo· 2025-09-02 07:23
Report on the Steel Industry Investment Rating - Not provided Core View - In August, the apparent demand for steel decreased month-on-month, the supply-demand gap widened, and inventory accumulation was obvious. In September - October, there is an expectation of seasonal strengthening in demand. If the apparent demand recovers, the supply-demand gap will narrow, and inventory accumulation will slow down, but high production still tests the demand - absorbing capacity during the peak season. Currently, steel prices have fallen from high levels. Unilateral short - selling space is limited, and selling out - of - the - money put options can be considered. With the obvious contraction of steel mill profits and considering the expected reduction in coking coal production, going long on the steel - iron ore ratio can be considered [1]. Summary by Directory Steel Prices and Spreads - The prices of various steel products such as rebar and hot - rolled coils in different regions and contracts have decreased, with rebar 10 - contract dropping by 51 yuan/ton and hot - rolled coil 01 - contract dropping by 43 yuan/ton [1]. Cost and Profit - The billet price decreased by 50 yuan/ton, and the slab price remained unchanged. The profits of hot - rolled coils in different regions showed different trends, with the profit in North China increasing by 22 yuan/ton and that in East China decreasing by 8 yuan/ton [1]. Supply - The daily average pig iron output decreased by 0.7 to 240.1, a decrease of 0.3%. The output of five major steel products increased by 6.5 to 884.6, an increase of 0.7%. Among them, the electric - furnace output increased by 1.5 to 31.3, an increase of 5.0%, and the converter output increased by 4.4 to 189.3, an increase of 2.4% [1]. Inventory - The rebar inventory increased by 16.4 to 623.4, an increase of 2.7%, and the hot - rolled coil inventory increased by 4.0 to 365.5, an increase of 1.1%. The inventory of five major steel products increased by 26.8 to 1467.9, an increase of 1.9% [1]. Transaction and Demand - The building materials trading volume increased by 0.6 to 8.9, an increase of 6.6%. The apparent demand for five major steel products increased by 4.8 to 857.8, an increase of 0.6%. The apparent demand for rebar increased by 9.4 to 204.2, an increase of 4.8%, and that for hot - rolled coils decreased by 0.5 to 320.7, a decrease of 0.2% [1]. Report on the Iron Ore Industry Investment Rating - Not provided Core View - The global iron ore shipping volume has increased significantly to a high for the year, and the arrival volume at 45 ports has risen. The demand side is affected by the high - level steel mill profit rate and the limited production during the military parade in Tangshan, with pig iron output slightly decreasing from a high level. The port inventory has decreased slightly, and the steel mill's equity iron ore inventory has decreased. In the future, pig iron output will slightly decline around the military parade, and the fundamentals are difficult to drive a sharp rise. The demand during the "Golden Nine and Silver Ten" is questionable. Unilateral short - selling at high levels is recommended, and the strategy of going long on iron ore and short on coking coal is recommended [3]. Summary by Directory Iron Ore - Related Prices and Spreads - The warehouse - receipt costs of various iron ore powders have decreased, with the warehouse - receipt cost of Carajás fines decreasing by 19.8 to 792.3, a decrease of 2.4%. The 01 - contract basis of various iron ore powders has increased, with the 01 - contract basis of Carajás fines increasing by 17.2 to 26.3, an increase of 188.8% [3]. Spot Prices and Price Indexes - The spot prices of various iron ore powders at Rizhao Port have decreased, with the price of Carajás fines at Rizhao Port decreasing by 18.0 to 873.0, a decrease of 2.0%. The prices of iron ore indexes such as the Singapore Exchange 62% Fe swap have also slightly decreased [3]. Supply - The 45 - port arrival volume (weekly) increased by 132.7 to 2526.0, an increase of 5.5%, and the global shipping volume (weekly) increased by 241.0 to 3556.8, an increase of 7.3%. The national monthly import volume decreased by 131.5 to 10462.3, a decrease of 1.2% [3]. Demand - The daily average pig iron output of 247 steel mills (weekly) decreased by 0.6 to 240.1, a decrease of 0.2%. The daily average port clearance volume of 45 ports (weekly) decreased by 7.1 to 318.6, a decrease of 2.2%. The national monthly pig iron output and crude steel output also decreased [3]. Inventory Changes - The 45 - port inventory decreased by 35.7 to 13763.02, a decrease of 0.3%. The imported iron ore inventory of 247 steel mills (weekly) decreased by 58.3 to 9007.2, a decrease of 0.6% [3]. Report on the Coke Industry Investment Rating - Not provided Core View - The coke futures have shown a volatile downward trend, and the spot price has stabilized after the increase. The supply side has a slight decrease in coking enterprise start - up due to limited production in some areas, and the demand side has a high - level decline in blast furnace pig iron. The inventory in various links has slightly increased, and the overall inventory is at a medium level. There is a possibility of a future price decline. Speculative short - selling at high levels is recommended, and the strategy of going long on iron ore and short on coke is recommended [5]. Summary by Directory Coke - Related Prices and Spreads - The prices of various coke contracts have decreased, with the coke 01 - contract dropping by 49 yuan/ton. The coking profit has decreased, with the weekly steel - union coking profit decreasing by 11 [5]. Supply - The daily average output of all - sample coking plants decreased by 0.9 to 64.5, a decrease of 1.4% [5]. Demand - The pig iron output of 247 steel mills decreased by 0.7 to 240.1, a decrease of 0.3% [5]. Inventory Changes - The total coke inventory decreased by 1.1 to 887.5, a decrease of 0.14%. The inventory of all - sample coking plants, 247 steel mills, and ports showed different trends [5]. Coke Supply - Demand Gap Changes - The coke supply - demand gap decreased by 1.3 to - 5.7, a decrease of 22.4% [5]. Report on the Coking Coal Industry Investment Rating - Not provided Core View - The coking coal futures have shown a volatile downward trend, and the spot market is generally weak and stable. The supply side has a slight decrease in coal mine start - up due to recent mine accidents and production suspension and rectification, and the demand side has a decrease in coking enterprise start - up and a high - level decline in pig iron output. The inventory in various links has a slight accumulation, and the overall inventory has slightly decreased. The coal price may continue to decline in September. Speculative short - selling of coking coal 01 at high levels is recommended, and the strategy of going long on iron ore and short on coking coal is recommended [5]. Summary by Directory Coking Coal - Related Prices and Spreads - The prices of various coking coal contracts have decreased, with the coking coal 01 - contract dropping by 33 yuan/ton. The profit of sample coal mines has decreased by 4, a decrease of 0.9% [5]. Supply - The raw coal output remained unchanged at 860.5, and the clean coal output increased by 1.8 to 444.5, an increase of 0.4% [5]. Demand - The coke output decreased, with the daily average output of all - sample coking plants decreasing by 0.9 to 64.5, a decrease of 1.4% [5]. Inventory Changes - The clean coal inventory of Fenwei coal mines decreased by 0.9 to 116.7, a decrease of 0.8%. The coking coal inventory of all - sample coking plants and 247 steel mills also showed different trends [5].