US Cash Crude-Grades fall on second full day of volatile roll trade period

HOUSTON, Nov 24 (Reuters) - Physically traded U.S. crude broadly fell on Monday with Mars Sour bucking the wider downward trend, dealers said, on the second full 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 December to January traded at a midpoint of 25 cents a barrel.

U.S. oil refiners are expected to have about 187,000 barrels per day of capacity offline in the week ending November 28, increasing available refining capacity by 458,000 bpd, research company IIR Energy said.

Offline capacity is expected to fall to 54,000 bpd in the week ending December 5, IIR said.

Meanwhile losses were curbed as the spread between West Texas Intermediate crude futures and global benchmark Brent stayed wide, which typically makes U.S. grades more attractive to foreign buyers.

The discount WTCLc1-LCOc1 traded as wide as minus $4.54 a barrel, suggesting an open arbitrage window.

• Light Louisiana Sweet for December delivery fell 10 cents to a midpoint of a $1.80 premium and was seen bid and offered between a $1.70 and $1.90 a barrel premium to U.S. crude futures CLc1 ​

• Mars Sour rose 20 cents to a midpoint of a 70-cent premium and was seen bid and offered between a 40-cent and $1 a barrel premium to U.S. crude futures CLc1 ​

• WTI Midland fell 5 cents to a midpoint of a 35-cent premium and was seen bid and offered between a 25-cent and 45-cent a barrel premium to U.S. crude futures CLc1 ​

• West Texas Sour fell 47 cents to a midpoint of a $2.45 discount and was seen bid and offered between a $2.55 and $2.35 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 January futures LCOc1 rose 81 cents to settle at $63.37 a barrel

• WTI January crude CLc1 futures rose 78 cents to settle at $58.84 a barrel

• The Brent/WTI spread narrowed 2 cents to last trade at minus $4.48, after hitting a high of minus $4.44 and a low of minus $4.54