Corn futures held above $5.10 per bushel, trading near their highest level in more than three years, as concerns over disruptions to Black Sea grain exports added support ahead of the region’s peak corn export season. The peak export window for Black Sea corn begins in October, raising concerns over global supplies as attacks continue to disrupt shipments from Ukraine and Russia. Ukraine accounts for roughly 10-11% of global corn exports, making prolonged disruptions a potential source of tighter supply. Meanwhile, the latest USDA weekly report showed a net reduction of 829,600 metric tons in US corn sales for the 2025/26 marketing year in the week ended August 27, although accumulated exports reached 85.06 million tons, up from 83.49 million a week earlier. Traders are also monitoring US crop prospects ahead of the harvest and await USDA’s updated crop estimates on September 11.