Corn Slips into the Weekend

Corn futures were slightly weaker on Friday with front-month contracts down a penny or less and December off 4.75 cents for the week as options expired; the CmdtyView national cash corn averaged $3.87¼. USDA’s delayed Grain Crushing report showed 463.44 million bushels used for ethanol in August (+1.2% m/m, -3.36% y/y), CFTC data through Oct. 7 showed managed-money with a 141,966-contract net short (adding 6,656), and the Buenos Aires Grain Exchange said Argentina is 37.3% planted (lagging last year) with the crop 79% rated excellent-to-normal—together suggesting weaker ethanol demand and sizeable short positioning weigh on near-term prices while slower Argentine plantings could limit downside.

Analysis

Corn futures were marginally weaker on Friday with front-month contracts down a penny or less and December off 4.75 cents for the week as options expired; the CmdtyView national cash corn averaged $3.87 1/4. Nearby contract closes reported Dec 25 at $4.25 1/2 (down $0.01), Mar 26 at $4.37 1/2 (down $0.0025) and May 26 at $4.44 3/4 (down $0.005), indicating very shallow intraday selling across the curve.

USDA’s delayed Grain Crushing report showed 463.44 million bushels used for ethanol in August, a 1.2% month-on-month increase but 3.36% below year-ago levels, signaling softer demand versus last year. CFTC data to Oct. 7 show managed-money increased net short exposure to 141,966 contracts (added 6,656), which amplifies downside pressure in the near term given current demand weakness.

Supply-side signals are mixed: the Buenos Aires Grain Exchange has Argentina 37.3% planted (up 0.7 ppt week-on-week) but still lagging last year, with the crop 79% rated excellent-to-normal, implying planting delays could limit downside if weather or delays persist. The combination of weak ethanol demand and large speculative short positions suggests limited immediate upside until clearer demand or South American supply developments emerge, making the market data-driven and susceptible to sudden weather or planting updates.

Key Decisions for Investors

• Given managed-money net short positions and weaker year-on-year ethanol use, avoid initiating sizable new long corn positions until demand metrics (next Grain Crushing) or positioning shows improvement
• Monitor two short-term triggers closely: the next USDA ethanol/grain-crushing update and weekly CFTC positioning, and be prepared to adjust exposure if ethanol demand rebounds or shorts start covering
• Consider using hedged option structures or calendar spreads to retain upside if South American plantings or weather tighten supply while limiting downside from continued speculative selling
• For tactical traders, favor short-duration or nearby-contract plays (including opportunistic shorts) through the options-expiry window, but limit size because delayed Argentine planting and crop condition could quickly reverse the move