Wheat prices have posted their most significant single-day gain in over a week, as mounting evidence suggests Russia remains committed to its military campaign in Ukraine, intensifying concerns about prolonged disruptions to grain shipments from the key Black Sea region.

Following the US Labor Day holiday, trading resumed on Tuesday with Chicago wheat futures surging as much as 3.1% in intraday trading, marking the largest percentage increase since August 28. This sharp uptick reverses course from last week, when prices had fallen heavily in the lead-up to a weekend meeting between US envoy and Russian President Vladimir Putin regarding the Ukraine situation. However, those talks yielded no visible signs of progress.

"The market's hopes for a substantive breakthrough in the weekend's Russia-Ukraine negotiations have been dashed, bringing the focus back to the reality of continued disruptions to Black Sea grain logistics," stated a report from CRM AgriCommodities on Monday.

The escalation of the conflict has led to attacks on grain terminals and other critical infrastructure used for transporting wheat, corn, and other agricultural products in the Black Sea area, causing a significant drop in vital food exports from one of the world's key supply hubs. Following his meeting with US officials over the weekend, Ukrainian President Volodymyr Zelensky indicated that he does not anticipate a swift conclusion to the confrontation with Moscow.

As of 10:28 AM Beijing time on Tuesday, wheat prices were up 2.9%, trading at $7.5550 per bushel, recovering from a more than 6% decline recorded during the previous week. In other agricultural commodities, corn futures added 0.7%, while soybeans edged up 0.1%.