DUBAI, Nov 30 (Reuters) - Here are some factors that may affect Middle East stock markets on Sunday. Reuters has not verified the press reports and does not vouch of their accuracy.INTERNATIONAL/REGIONAL* OPEC decision knocks oil down, dollar gains MKTS/GLOB* U.S. crude down 10 pct post-OPEC, Brent breaks below $70 O/R* FACTBOX-Analysts&apos reactions on OPEC decision ID:nL2N0TI0VM* Billions wiped