Corn, wheat, and soybeans all traded higher overnight on growing optimism over the U.S.-China trade negotiations, though markets could not hold those gains. The talks in London made solid progress and negotiations are reportedly on track with the Geneva agreement that is allowing broader trade negotiation to continue under reduced tariffs for rare earth minerals to the U.S. and the resumption of visas for Chinese students. Until agricultural products are explicitly mentioned in the negotiations, it will be difficult for the ag markets to rally seriously. That latter fact seemed to take hold during the day session and grain futures turned lower in the day session with traders unwilling to add risk ahead of Thursday’s WASDE report from...