US Cash Crude-Grades mixed on first full day of volatile roll period

HOUSTON, Dec 22 (Reuters) - Grades were mixed on Monday, dealers said, on the first day of the volatile roll trading period.

Traders use the three-day roll period to adjust their crude slates, square up positions and net out exposures following the expiration of the U.S. crude futures contract.

Prices to roll U.S. crude oil futures positions from January to February traded at a midpoint of 15 cents a barrel.

U.S. oil refiners are expected to have about 145,000 barrels per day of capacity offline in the week ending December 26, increasing available refining capacity by 41,000 bpd, research company IIR Energy said.

• Light Louisiana Sweet for January delivery rose 7 cents to a midpoint of a $2.70 premium and was seen bid and offered between a $2.40 and $3 a barrel premium to U.S. crude futures CLc1 ​

• Mars Sour fell 10 cents to a midpoint of a 40-cent discount and was seen bid and offered between a 50-cent and 30-cent a barrel discount to U.S. crude futures CLc1 ​

• WTI Midland rose 15 cents to a midpoint of a 60-cent premium and was seen bid and offered between a 50-cent and 70-cent a barrel premium to U.S. crude futures CLc1 ​

• West Texas Sour fell 60 cents to a midpoint of a $2.60 discount and was seen bid and offered between a $2.70 and $2.50 a barrel discount to U.S. crude futures CLc1 ​

• WTI at East Houston , also known as MEH, traded between a 50-cent and 70-cent a barrel premium to U.S. crude futures CLc1 ​

• ICE Brent February futures LCOc1 rose $1.60 to settle at $62.07 a barrel

• WTI February crude CLc1 futures rose $1.49 to settle at $58.01 a barrel

• The Brent/WTI spread widened 12 cents to last trade at minus $4.07, after hitting a high of minus $3.94 and a low of minus $4.08