MIDEAST STOCKS-Saudi ends nine-day winning streak, rest of region mixed

* Profit-taking pulls down Saudi banks after surge on bond issue * Petrochemicals underperform market after oil drops * Dubai Investments climbs after strong Q3 earnings * Qatar's Ezdan bounces from seven-month low * Foreign investors again net sellers by big margin in Egypt By Andrew Torchia DUBAI, Nov 1 (Reuters) - Saudi Arabia's stock market ended a nine-day rising streak on Tuesday as banking shares were hit by profit taking, while bourses in the rest of the region were mixed. The Saudi stoc