DUBAI - Saudi Arabia's stock market ignored a huge investment conference in Riyadh and remained flat while Emaar Properties EMAR.DU and contractor Drake & Scull DSI.DU helped Dubai to rebound on Tuesday.

The market barely reacted to bullish news from a major investment conference in the kingdom, which attracted hundreds of bankers, businessmen and government officials from around the world.

Crown Prince Mohammed bin Salman, the 32-year-old architect of reforms designed to end Saudi Arabia's reliance on oil exports, announced a $500 billion plan to build a business and industrial zone that would extend into Jordan and Egypt.

The Saudi main index .TASI lost one point after the closing to 6,885 points, extending this week's losses as the market was split between losers and gainers.

Saudi banks recovered from Monday's losses with National Commercial Bank (NCB) 1180.SE , the kingdom's largest lender, rebounding 2.6 percent after dropping 4.78 percent.

Alinma Bank 1150.SE was up 1.1 percent in heavy trade while Bank Aljazira 1020.SE rebounded 1.4 percent, having reported a 41 percent rise in third-quarter net profit to 228 million riyals ($60.80 million) on Monday.

However, most of Saudi insurers fell for the second consecutive day with Metlife AIG ANB Cooperative Insurance 8011.SE dropping 1.4 percent, while Malath Insurance 8020.SE lost 1.8 percent.

Oil prices helped petrochemical shares as PetroRabigh 2380.SE edged up 0.2 percent and Petrochem 2002.SE 0.6 percent. Mining firm Ma'aden 1211.SE rose 1.4 percent.

The Dubai index .DFMGI rose 0.6 percent with Emaar EMAR.DU adding 1.5 percent, recovering part of a 2.0 percent loss sustained on Monday after the company said it expected to sell 20 percent of property development unit Emaar Development LLC next month in an initial public offering.

Previously, Emaar had said it would offer up to 30 percent of the business, distributing the funds raised as dividends to shareholders in the parent company. It did not say on Sunday why the sale was expected to be only 20 percent.

Builder Drake & Scull DSI.DU was the most heavily traded stock and rose 2.9 percent.

In Abu Dhabi, the index .ADI was almost flat at 4,496 points percent. Eshraq Properties ESHR.AD rose 1.3 percent after reporting on Monday a third-quarter net profit of 685,000 dirhams ($187,000), which followed losses of 48.5 million dirhams one year earlier.

Dana Gas DANA.AD extended losses 1.3 percent as investors are still waiting for a London court hearing on a dispute over the company's $700 million sukuk due at the end of this month.

Qatar's index .QSI was down 0.1 percent. Qatar National Bank QNBK.QA , the biggest bank in the Middle East, inched up 0.1 percent in heavy trade. Ahli Bank AABQ.QA jumped 3.6 percent.



HIGHLIGHTS



SAUDI ARABIA



* The index .TASI was flat to lower at 6,885 points.



DUBAI



* The index .DFMGI dropped 0.6 percent to 3,641 points.



ABU DHABI



* The index .ADI was flat to lower at 4,496 points.



QATAR



* The index .QSI edged down 0.1 percent to 8,110 points.



EGYPT



* The index .EGX30 gained 0.4 percent to 13,928 points.



KUWAIT



* The index .KWSE edged down 0.4 percent to 6,622 points.



BAHRAIN



* The index .BAX was down 0.9 percent to 1,276 points.



OMAN



* The index .MSI was flat at 5,033 points.

($1 = 3.7501 riyals)

(Reporting by Aziz El Yaakoubi, editing by Ed Osmond) ((aziz.elyaakoubi@thomsonreuters.com; +971552994086))