玉米类市场周报：拍卖成交降温影响，期货盘面继续回落-20250711

1. Report Industry Investment Rating - Not provided in the report 2. Core View of the Report - For corn, the international corn price has an advantage due to the good initial growth condition in the US. In the domestic market, the cooling of imported corn auction transactions, strong selling intention of grain holders, increasing feed substitution of wheat, and weakening feed demand have led to a decline in corn prices. The corn futures price continued to fall this week, showing overall weakness [8]. - For corn starch, although the production loss of corn starch enterprises has reduced the supply pressure, the demand in the civilian and paper - making markets is poor, and the inventory has increased. Affected by the decline of corn prices, the starch futures price has also shown a weak oscillation recently [12]. - The strategy for both corn and corn starch is to focus on short - term trading [7][11]. 3. Summary by Relevant Catalogs 3.1. Week - to - Week Key Points Summary Corn - Market Review: The corn futures price fluctuated and declined this week. The closing price of the main 2509 contract was 2306 yuan/ton, a decrease of 47 yuan/ton compared with the previous week [8]. - Market Outlook: The excellent rate of US corn is high, and the international corn price has an advantage. In the domestic market, the cooling of auction transactions, increased market supply, and substitution of wheat have led to weakening prices [8]. - Strategy Recommendation: Focus on short - term trading [7]. Corn Starch - Market Review: The Dalian corn starch futures price fluctuated and declined. The closing price of the main 2509 contract was 2656 yuan/ton, a decrease of 61 yuan/ton compared with the previous week [12]. - Market Outlook: The production loss has reduced the supply pressure, but the demand is in the off - season, and the inventory has increased. Affected by the decline of corn prices, the starch price has shown a weak oscillation [12]. - Strategy Recommendation: Focus on short - term trading [11]. 3.2. Futures and Spot Market Futures Price and Position Changes - The corn futures September contract continued to decline, with a total position of 1030900 lots, an increase of 85554 lots compared with the previous week. The corn starch futures September contract also declined, with a total position of 247864 lots, an increase of 69516 lots compared with the previous week [18]. Top 20 Net Position Changes - The top 20 net position of corn futures was - 30902, and the net short position decreased compared with the previous week. The top 20 net position of starch futures was - 9506, and the net short position also decreased [24]. Futures Warehouse Receipts - The registered warehouse receipt volume of yellow corn was 196479, and that of corn starch was 21979 [30]. Spot Price and Basis - As of July 10, 2025, the average spot price of corn was 2426.86 yuan/ton, and the basis between the September futures price and the spot price was + 120 yuan/ton. The spot price of corn starch in Jilin was 2850 yuan/ton, and in Shandong was 2920 yuan/ton, with a slightly decreasing trend. The basis between the September futures price and the Jilin spot price was 194 yuan/ton [35][39]. Futures Inter - month Spread - The 9 - 1 spread of corn was 75 yuan/ton, at a medium level in the same period. The 9 - 1 spread of starch was 44 yuan/ton, also at a medium level in the same period [45]. Futures Spread - The spread between the September contracts of starch and corn was 350 yuan/ton. In the 28th week of 2025, the spread between Shandong corn and corn starch was 410 yuan/ton, an increase of 10 yuan/ton compared with the previous week [53]. Substitute Spread - As of July 10, 2025, the spread between wheat and corn was 18.64 yuan/ton. In the 28th week of 2025, the average spread between cassava starch and corn starch was 139 yuan/ton, an increase of 19 yuan/ton compared with the previous week [58]. 3.3. Industrial Chain Situation Corn - Supply Side - Port Inventory: As of July 4, 2025, the domestic trade corn inventory in Guangdong Port was 88.6 tons, a decrease of 15.5 tons compared with the previous week, and the foreign trade inventory was 1.3 tons, an increase of 1 ton compared with the previous week. The corn inventory in the four northern ports was 259.6 tons, a decrease of 12.8 tons compared with the previous week, and the shipping volume was 41.8 tons, an increase of 16.6 tons compared with the previous week [49]. - Monthly Import: In May 2025, the total import volume of ordinary corn was 190,000 tons, a decrease of 860,000 tons (81.9%) compared with the same period last year and an increase of 10,000 tons compared with the previous month [67]. - Feed Enterprise Inventory: As of July 10, the average inventory of national feed enterprises was 31.58 days, a decrease of 0.38 days compared with the previous week, a month - on - month decrease of 1.19%, and a year - on - year increase of 1.38% [71]. - Demand Side - Livestock Inventory: As of the end of the first quarter of 2025, the pig inventory was 417.31 million, a year - on - year increase of 2.2%. At the end of May, the inventory of breeding sows was 40.42 million, a month - on - month increase of 40,000 and a year - on - year increase of 1.15% [75]. - Breeding Profit: As of July 4, 2025, the breeding profit of self - bred and self - raised pigs was 119.72 yuan/head, and that of purchased piglets was - 26.26 yuan/head [79]. - Processing Profit: As of July 11, 2025, the processing profit of corn starch in Jilin was - 66 yuan/ton. The processing profit of corn alcohol in Henan was - 585 yuan/ton, in Jilin was - 399 yuan/ton, and in Heilongjiang was - 85 yuan/ton [84]. Corn Starch - Supply Side - Enterprise Inventory: As of July 9, 2025, the total corn inventory of 96 major corn processing enterprises in 12 regions was 4.436 million tons, an increase of 1.88% [88]. - Starch Production and Inventory: From July 3 to July 9, 2025, the total national corn processing volume was 536,700 tons, a decrease of 8,000 tons compared with the previous week; the national corn starch production was 259,400 tons, a decrease of 5,500 tons compared with the previous week; the weekly operation rate was 50.14%, a decrease of 1.06% compared with the previous week. As of July 9, the total starch inventory of national corn starch enterprises was 1.337 million tons, an increase of 24,000 tons compared with the previous week, a weekly increase of 1.83%, a monthly increase of 2.14%, and a year - on - year increase of 26.97% [92]. 3.4. Option Market Analysis - As of July 11, the implied volatility of the options corresponding to the main 2509 contract of corn was 7.67%, a decrease of 1.05% compared with 8.72% in the previous week. The implied volatility continued to decline this week and was at a slightly higher level than the 20 - day, 40 - day, and 60 - day historical volatilities [95].