US Cash Crude-Grades largely firm after volatile roll trade period

Oct 27 (Reuters) - Physically traded U.S. crude grades strengthened on Monday, the first day of December delivery, dealers said, after a volatile roll trading period.

WTI Midland gained 35 cents, while WTI at East Houston, also known as MEH, climbed 25 cents.

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.

The spread between West Texas Intermediate crude futures and global benchmark Brent narrowed, but stayed wide enough to incentivize exports.

On the supply side, eight OPEC+ nations are leaning towards making another modest increase in oil output for December when they meet on Sunday as Saudi Arabia pushes to reclaim market share, four sources familiar with the talks said.

Iraq, the OPEC group's biggest overproducer, was in negotiations over the size of its quota within its available capacity of 5.5 million barrels per day, oil minister Hayan Abdel-Ghani said at an oil conference on Monday.

In refining news, U.S. oil refiners are expected to have about 981,000 barrels per day of capacity offline in the week ending October 31, increasing available refining capacity by 111,000 bpd, research company IIR Energy said on Monday.

• Light Louisiana Sweet for November delivery eased 23 cents to a midpoint of a $1.40 premium and was seen bid and offered between a $1.20 and $1.60 a barrel premium to U.S. crude futures CLc1 ​

• Mars Sour eased 35 cents to a midpoint of a 75-cent discount and was seen bid and offered between a $1.00 and 50-cent a barrel discount to U.S. crude futures CLc1 ​

• WTI Midland firmed 35 cents to a midpoint of a 60-cent premium and was seen bid and offered between a 40-cent and 80-cent a barrel premium to U.S. crude futures CLc1 ​

• West Texas Sour firmed 20 cents to a midpoint of a 25-cent discount and was seen bid and offered between ​ discount of 50 cents and parity to U.S. crude futures CLc1

• WTI at East Houston , also known as MEH, traded between a 75-cent and $1.15 a barrel premium to U.S. crude futures CLc1

• ICE Brent December futures LCOc1 fell 32 cents to settle at $65.62 a barrel on Monday​.

• WTI December crude CLc1 futures fell 19 cents to settle at $61.31 a barrel on Monday​.

• The Brent/WTI spread narrowed 12 cents to to last trade at minus $4.32, after hitting a high of minus $4.30 and a low of minus $4.46.