DUBAI, May 29 (Reuters) - Gulf stock markets were mixed in quiet, early trade on Monday with low-priced shares favoured by local retail investors lifting Dubai's bourse.

The Dubai index added 0.6 percent. The four most active stocks were worth less than 1 dirham each, with Union Properties , the most heavily traded stock, gaining 0.8 percent.

Amusement park operator DXB Entertainments , whose slide this year has weighed heavily on the Dubai market, edged up 0.9 percent after it said chief executive Raed Kajoor al- Nuaimi had been appointed CEO of a new entity that will manage development projects for Dubai Holding and Meraas Holding. Nuaimi will remain CEO of DXBE until a new CEO is appointed, the company said without elaborating.

Saudi Arabia's index edged down 0.2 percent in the first 45 minutes as petrochemical producer Nama Chemicals , which had plunged its 10 percent daily limit on Sunday, slid a further 4.2 percent.

Qatar's index lost 0.5 percent as Qatar National Bank fell 1.2 percent, although Qatar First Bank , the most heavily traded stock, climbed 4.2 percent. In the last several days it has rebounded from record lows in unusually heavy trade.

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