DUBAI, Jan 15 (Reuters) - Gulf stock markets may have a modestly firm tone on Sunday after rises in global equities at the end of last week.

On Friday Europe's broad FTSEurofirst 300 index .FTEU3 closed up 1 percent and the Nasdaq Composite .IXIC added 0.5 percent to a record-high close. Brent crude futures LCOc1 closed at $55.45 a barrel, roughly flat from their level when Gulf bourses closed on Thursday.

Two Omani banks posted earnings in line with analysts' estimates. Bank Muscat BMAO.OM , Oman's largest lender, posted a 1.3 percent increase in fourth-quarter net profit to 39.7 million rials ($103.2 million). ID:nD5N1E900J

Bank Dhofar BDOF.OM reported a 19.6 percent fall in fourth-quarter profit to 10.75 million rials. ID:nL5N1F501L

(Reporting by Celine Aswad; Editing by Andrew Torchia) ((celine.aswad@thomsonreuters.com; +971 4 4536886; Reuters Messaging: celine.aswad.thomsonreuters.com@reuters.net))