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

Oct 23 (Reuters) - Physically traded U.S. crude grades were mixed on Thursday, dealers said, on the first 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 November to December traded at a midpoint of 80 cents a barrel.

The spread between West Texas Intermediate crude futures and global benchmark Brent widened, which typically makes U.S. grades more attractive to foreign buyers.

The discount WTCLc1-LCOc1 widened to as much as minus $4.24 a barrel. A discount of around $4 suggests an open arbitrage window.

• Light Louisiana Sweet WTC-LLS for November rose 10 cents to a midpoint of a $1.63 premium and was seen bid and offered between a 75-cent and $2.50 a barrel premium to U.S. crude futures CLc1

• Mars Sour WTC-MRS fell 5 cents to a midpoint of a $1.50 discount and was seen bid and offered between a $1.60 and $1.40 a barrel discount to U.S. crude futures CLc1

• WTI Midland WTC-WTM rose 15 cents to a midpoint of a 40-cent premium and was seen bid and offered between a 30-cent and 50-cent a barrel premium to U.S. crude futures CLc1

• West Texas Sour WTC-WTS rose 8 cents to a midpoint of a 53-cent discount and was seen bid and offered between a 75-cent and 30-cent a barrel discount to U.S. crude futures CLc1

• WTI at East Houston WTC-MEH, also known as MEH, traded between a 65-cent and 85-cent a barrel premium to U.S. crude futures CLc1

• ICE Brent December futures LCOc1 rose $3.40 to settle at $65.99 a barrel.

• WTI December crude CLc1 futures rose $3.29 to settle at $61.79 a barrel.

• The Brent/WTI spread WTCLc1-LCOc1 widened 6 cents to last trade at minus $4.15, after hitting a high of minus $3.99 and a low of minus $4.24