* Saudis expected to announced details of reforms

* Zain Saudi up 10 pct daily limit on loan refinancing

* UAE economic data support Dubai and Abu Dhabi shares

* Dubai index rebounds from support on 100-day average

* Egypt's non-oil business activity shrinks, hits shares

By Celine Aswad

DUBAI, June 5 (Reuters) - Saudi Arabia's stock market fell on Sunday the details of the kingdom's economic reforms are announced, but telecommunications operator Zain Saudi soared in response to a loan refinancing. Other regional markets were mixed.

The Saudi index .TASI dropped sharply late in the session and closed 1.2 percent lower.

The Saudi government is expected to announced on Monday details of economic reforms that it originally outlined in April. That may include targets in a drive to make government more efficient, efforts to involve the private sector in development, and possibly fiscal steps to curb a budget deficit caused by low oil prices.

April's announcement was largely a list of aspirations rather than specific measures, and it remains unclear whether Monday's announcement will include much more detail.

In any case, Saudi investors sold on Sunday in the belief the market has already largely digested positive aspects of the reforms and the details may contain aspects that are bad for stocks, such as fiscal austerity.

Mining company Ma'aden 1211.SE , which surged after the April announcement because of hopes that it would spearhead the reform plan's efforts to develop the mining industry, sank 3.3 percent on Sunday.

Saudi Basic Industries 2010.SE , which could be hurt by future cuts in energy and gas feedstock subsidies, dropped 3.6 percent.

But Zain Saudi 7030.SE jumped its 10 percent daily limit to 8.25 riyals after saying it had signed a 2.25 billion-riyal ($600 million) loan refinancing with a group of four local banks. The stock is below its mean target price of 9.64 riyals, according to the average of nine analysts polled by Reuters.



UAE, EGYPT

Business activity in the United Arab Emirates' non-oil private sector grew faster in May as employment resumed expanding, according to a purchasing managers' survey published on Sunday urn:newsml:reuters.com:*:nL9N17702N .

"This may have offered some encouragement for investors to buy back on price dips," said a Dubai-based trader.

Abu Dhabi's index .ADI added 1.0 percent as investors bought banking shares, which were the main laggards last week. First Gulf Bank FGB.AD and Abu Dhabi Commercial Bank ADCB.AD climbed 1.3 and 1.2 percent respectively.

Dubai's index .DFMGI reversed early losses and added 0.7 percent to 3,285 points, rebounding from technical support on its 100-day average, now at 3,237 points, as it did in late May.

Shuaa Capital SHUA.DU jumped 3.8 percent, taking its gains to 5.6 percent since last Tuesday, when Reuters reported that several local investment firms were among the bidders for Dubai Group's 48.4 percent stake in the Islamic financial firm urn:newsml:reuters.com:*:nL8N18S4R2 .

Dubai Islamic Bank DISB.DU added 1.8 percent, snapping a four-session losing streak. The stock had been in a downtrend since its rights issue started trading on May 30; the last day of trading those rights will be June 13.

Business activity in Egypt shrank for the eighth straight month in May though at a slower pace than in the previous three months, a purchasing managers' survey showed. With more than four-fifths of stocks retreating, Cairo's main index .EGX30 fell 0.7 percent urn:newsml:reuters.com:*:nL8N18U471 .

Cleopatra Hospital Holding CLHO.CA , which listed on Thursday, fell 0.4 percent. The company announced a 57 percent increase in its 2015 annual net profit to 68.8 million Egyptian pounds ($7.8 million). On Thursday, shares in the hospital operator jumped 6.9 percent.



SUNDAY'S HIGHLIGHTS



SAUDI ARABIA

* The index .TASI dropped 1.2 percent to 6,413 points.



DUBAI

* The index .DFMGI added 0.7 percent to 3,285 points.



ABU DHABI

* The index .ADI climbed 1.0 percent to 4,296 points.



QATAR

* The index .QSI rose 0.4 percent to 9,571 points.



EGYPT

* The index .EGX30 fell 0.7 percent to 7,564 points.



KUWAIT

* The index .KWSE edged down 0.1 percent to 5,371 points.



OMAN

* The index .MSI edged down 0.02 percent 5,819 points.



BAHRAIN

* The index .BAX edged down 0.1 percent to 1,115 points.
(Editing by Andrew Torchia, Larry King) ((celine.aswad@thomsonreuters.com;+971 562 247 653 Reuters Messaging: celine.aswad.thomsonreuters.com@reuters.net))