Asian stocks were poised for their fourth-straight weekly fall on Friday, with the regional index drifting in an aimless morning session as the civil unrest in Hong Kong and caution ahead of a closely-watched U.S. Already disappointed by the European Central Bank, which gave no new hints of an imminent sovereign bond buying program, markets were further underwhelmed by a survey showing growth in China’s services sector eased last month. MSCI’s broadest index of Asia-Pacific shares outside Japan eased 0.06 percent, on track for a fourth straight week of declines.