DUBAI - Gulf stock markets largely moved sideways in thin, early trade on Tuesday with activity dampened by the absence of some foreign investors for year-end holidays.

The Saudi index was roughly flat in the first half-hour; the most heavily traded stock, Dar Al Arkan, fell 1.1 percent but the second most active, Chemanol, surged 3.8 percent.

Saudi Industrial Export  jumped 6.9 percent as a capital decrease to 10.8 million riyals ($2.9 million) from 108 million riyals through a share cancellation went into effect.

Dubai's index edged down 0.2 percent as two Bahraini banks which have been the focus of much speculative trade in the last few days, Khaleeji Commercial Bank and Al Salam Bank, pulled back.

Qatar's index edged down 0.2 percent but Qatar First Bank, the most heavily traded stock, continued a rebound from record lows that began in late November, gaining 1.4 percent.

(Reporting by Andrew Torchia; Editing by Robin Pomeroy) ((andrew.torchia@thomsonreuters.com)(+9715 6681 7277)(Reuters Messaging: andrew.torchia.thomsonreuters.com@reuters.net))