MIDEAST STOCKS-Egypt lifted by foreign money; Gulf bourses lose steam

* Foreign funds boost Egypt's bourse for second straight day * Saudi shares slip in final hour, banks weak * Advanced Petrochemical, Sipchem gain 2 pct on positive news * Property sector weighs on Abu Dhabi * National Bank of Kuwait gains on first day of new rights issue By Celine Aswad DUBAI, May 18 (Reuters) - Foreign funds boosted the Egyptian stock market for a second straight day on Wednesday, exchange data showed, while Gulf bourses lost steam as investors took profits. Cairo's main index