Grains & Sugar Weekly 09/18/2026

Soybean prices remain supported by tight near-term supplies and strong Chinese demand, but the market is vulnerable to liquidation if the US-China summit disappoints.

• December soybean meal reached a 2.5-year high of $371.30 before settling at $358.60, while August NOPA crush fell 5.2% from July to 205.456 million bushels, below the 211.6 million expected.
• China booked more than 1 million metric tons of soybeans during the week, bringing trader-estimated marketing-year purchases to roughly 13 million tons against a 25 million-ton commitment; November soybeans may need fresh Chinese buying to hold $13.00.
• Wheat fell for a third consecutive week as peace headlines weighed on prices, with December Chicago wheat settling at $7.14 1/4, while Russian Black Sea loadings dropped to 7,400 metric tons from 41,000 the prior week and US accumulated export sales remained down 31% year on year.
• Corn was constrained by harvest and speculative positioning: USDA cut its yield estimate to 178.5 bushels per acre, but managed money still held a record net long of 414,460 contracts as of Tuesday; a September 30 stocks report could validate or challenge the market’s tight-balance-sheet assumptions.
• Sugar lost 4.4% on the week to 17.36 cents as funds reduced a recently established long position, despite Brazilian Center-South output falling 10.7% year to date to 23.95 million tons and India’s monsoon running 15% below normal.

Takeaway: Commodity prices are being driven by the tension between tightening supply risks and vulnerable speculative longs, with the China-US summit, harvest progress, stocks data, export flows and sugar deliveries likely to determine whether recent declines extend or reverse.