Gulf stock markets headed south in Monday's closing over ongoing US political stalemate on the nation's budget deficit and Europe's debt woes. Monday Dubai's shares slumped to the lowest in almost a month led by Emaar Properties PJSC. Saudi Arabia's Tadawul All Share Index fell 0.86 percent to 6,153.57 points and Oman's MSM30 Index declined 0.9 percent. Abu Dhabi's ADX General Index retreated 0.4 percent. Qatar's QE Index declined 1.4 percent. Kuwait's SE Price Index dropped 0.7 percent. Bahrain's benchmark slumped 1.3 percent, snapping a four-day rally. Emaar Dubai Financial Market PJSC, the only publicly traded Gulf Arab stock market, slumped to the lowest since February 2009. Dubai's DFM General Index slipped 0.9 percent to 1,355.18, the lowest level since Oct. 26.