How much is a Second Class stamp? keflex treat std The spread, which settled at $1.21 a barrel on Monday,narrowed to $1.06 during European hours before widening out to$2.68, near the 14-day moving average, in early U.S. activity.It closed at $1.19 as U.S. crude, also known as West TexasIntermediate, staged a late rally relative to Brent, beforenarrowing to 98 cents in post-settlement activity.