That spread, about $1.80, or 10%, Monday trended in from about $2 on a report that the deal looks likely to clear its review in South Korea, even though the time line for that approval was said to be a spring date. More importantly, the review of the deal with the Department of Justice in the U.S. has reached a stage of that agency vetting a buyer of assets to be divested to get the deal done, a source said.