SINGAPORE, Aug 8 (Reuters) - Singapore's second-largest lender Oversea-Chinese Banking Corp reported a larger-than-expected 40% fall in quarterly net profit on Friday, hurt by loan-loss provisions and a slowdown in customer activity.

Net profit declined to S$730 million in the June quarter from S$1.2 billion a year earlier and versus the average estimate of S$980 million of five analysts, according to data from Refinitiv. (Reporting by Anshuman Daga; Editing by Muralikumar Anantharaman)