Report Summary 1. Report Industry Investment Rating No relevant content provided. 2. Core Viewpoints - The overall trend of the corn and corn starch markets remains weak, and it is recommended to mainly engage in short - side trading [9][13]. - For corn, the USDA's August supply - demand report is bearish, with increased U.S. corn production and ending stocks. In the domestic market, the continuous auction of imported corn, the upcoming listing of new - season corn, and weak market consumption have put pressure on the price [8][9]. - For corn starch, the resumption of operations by previously - overhauled enterprises has increased supply, while downstream demand is in the off - season, resulting in an obvious oversupply situation [14]. 3. Summary by Directory 3.1. Week - on - Week Key Points Summary - Corn: The main 2511 contract of corn futures closed lower this week at 2190 yuan/ton, down 9 yuan/ton from the previous week. The USDA's report is bearish, and the domestic market is affected by factors such as corn auctions and new - season corn listing, with weak spot prices. It is recommended to mainly engage in short - side trading [9]. - Corn Starch: The main 2511 contract of Dalian corn starch futures closed slightly lower after narrow - range fluctuations at 2522 yuan/ton, down 20 yuan/ton from the previous week. Supply pressure has increased due to the resumption of operations, and demand is weak. Inventory has increased, and it is recommended to mainly engage in short - side trading [14]. 3.2. Futures and Spot Market - Futures Price and Position Changes: The November contract of corn futures closed lower with a total position of 828,457 lots, an increase of 236,354 lots from last week. The November contract of corn starch futures closed lower after narrow - range fluctuations with a total position of 138,621 lots, an increase of 31,700 lots from last week [18]. - Top 20 Net Position Changes: The top 20 net position of corn futures this week was - 75,073, and the net short position increased compared to last week; the top 20 net position of starch futures was - 16,392, and the net short position also increased [25]. - Futures Warehouse Receipts: The registered warehouse receipts of yellow corn were 132,529, and the registered warehouse receipts of corn starch were 7,450 [31]. - Spot Price and Basis: As of August 14, 2025, the average spot price of corn was 2,394.12 yuan/ton, and the basis between the active November contract and the spot average price was + 204 yuan/ton. The spot price of corn starch in Jilin was 2,850 yuan/ton, and in Shandong was 2,950 yuan/ton, remaining stable this week. The basis between the November contract of corn starch and the spot price in Changchun, Jilin was 328 yuan/ton [36][40]. - Futures Inter - month Spread Changes: The 11 - 1 spread of corn was 3 yuan/ton, at a medium level in the same period; the 11 - 1 spread of starch was - 28 yuan/ton, also at a medium level in the same period [46]. - Futures Spread Changes: The spread between the November contracts of starch and corn was 332 yuan/ton. In the 33rd week of 2025, the spread between Shandong corn and corn starch was 400 yuan/ton, the same as last week [55]. - Substitute Spread Changes: As of August 14, 2025, the average spot price of wheat was 2,438.11 yuan/ton, and the average spot price of corn was 2,394.12 yuan/ton, with a wheat - corn spread of 43.99 yuan/ton. In the 33rd week of 2025, the average spread between cassava starch and corn starch was 138 yuan/ton, widening by 21 yuan/ton compared to last week [59]. 3.3. Industry Chain Situation - Corn Supply - Side: As of August 8, 2025, the domestic trade corn inventory in Guangdong Port was 748,000 tons, a decrease of 144,000 tons from last week; the foreign trade inventory was 3,000 tons, a decrease of 1,000 tons from last week. The corn inventory in the four northern ports was 1.774 million tons, a week - on - week decrease of 131,000 tons; the shipping volume from the four northern ports was 247,000 tons, an increase of 7,000 tons from last week. In June 2025, China's ordinary corn imports were 160,000 tons, a year - on - year decrease of 760,000 tons or 82.61%. As of August 14, the average inventory days of feed enterprises across the country was 29.61 days, a decrease of 0.83 days from last week, a week - on - week decrease of 2.73%, and a year - on - year increase of 2.07% [50][68][72]. - Corn Demand - Side: As of the end of the second quarter of 2025, the pig inventory was 424.47 million, a year - on - year increase of 2.2%; the breeding sow inventory was 40.43 million, an increase of 10,000 from the previous month, accounting for 103.7% of the normal reserve of 39 million. As of August 8, 2025, the self - breeding and self - raising pig farming profit was 45.13 yuan per head, and the profit from purchasing piglets for farming was - 134.14 yuan per head. As of August 14, 2025, the corn starch processing profit in Jilin was - 63 yuan/ton. As of August 15, 2025, the corn alcohol processing profit in Henan was - 607 yuan/ton, in Jilin was - 503 yuan/ton, and in Heilongjiang was - 186 yuan/ton [76][80][84]. - Corn Starch Supply - Side: As of August 13, 2025, the total corn inventory of 96 major corn processing enterprises in 12 regions across the country was 3.402 million tons, a decrease of 6.62%. From August 7 to August 13, 2025, the total national corn processing volume was 576,000 tons, an increase of 15,500 tons from last week; the national corn starch production was 289,200 tons, an increase of 10,700 tons from last week; the weekly operating rate was 55.9%, an increase of 2.07% from last week. As of August 13, the total starch inventory of national corn starch enterprises was 1.332 million tons, an increase of 12,000 tons from last week, a week - on - week increase of 0.91%, a month - on - month increase of 1.60%, and a year - on - year increase of 20.33% [88][92]. 3.4. Option Market Analysis As of August 15, the implied volatility of the options corresponding to the main 2511 contract of corn was 10.35%, an increase of 0.67% from 9.68% last week. This week, the implied volatility fluctuated up and down, at a relatively high level compared to the 20 - day, 40 - day, and 60 - day historical volatilities [95].
玉米类市场周报：现货市场疲弱，期货维持偏弱调整-20250815
Rui Da Qi Huo·2025-08-15 09:41