CHICAGO: Chicago corn fell on Monday, pressured by uncertainty in the Black Sea region as talks of a ceasefire in Ukraine could open up the region to exports, though progress remains uncertain.

Wheat eased early in the session, but returned to near even on news that Russia is suspending exports to protect domestic food supplies as tariffs damage the nation’s economy.

Soybeans were initially supported by Argentina’s decision to halt exports registration of soyoil and meal, which could increase oilseed demand in other countries to produce alternative supplies, though the suspension is expected to be temporary.

Chicago Board of Trade most-active corn had lost 16-1/4 cents to $7.46-1/4 a bushel by 12:54 p.m. CST (1754 GMT).

Wheat added 6 cents to $11.12-1/2 a bushel, while soybeans lost 6 cents to $16.70 a bushel.

Ukraine said on Monday that it had begun “hard” talks on a ceasefire, immediate withdrawal of troops and security guarantees with Russia. Both sides reported progress, though details were scant.

The uncertainty left grain traders unclear about the availability of global supplies.

“There’s just a lot of nervousness. Nobody’s terribly comfortable with their wheat positions,” said John Zanker, market analyst at Risk Management Commodities. Earlier losses in wheat were erased as Russia looks to suspend exports of wheat, barley, corn and rye until June 30, the Interfax news agency reported, citing the agriculture ministry.