Indian government bonds ended a bruising October with fresh losses on Friday, marking a fourth straight monthly decline as oil's surge rekindled inflation fears and the central bank's broader tightening campaign rattled the market.The benchmark 6.94% 2036 bond yield rose 2.5 basis points to 7.4139%, advancing 22.5 bps in October. Bond yields move inversely to prices.Brent crude is poised for a fourth monthly advance, up nearly 14% in October, clouding the economic outlook for the world's third-largest oil importer.It surged to $117.55 on Friday, its highest intraday level since April 30, as investors priced in a potential escalation of the US-Iran conflict after the US midterm elections next week.Foreign money also continued to flow out of the Indian bond market, with exposure to index-eligible notes falling to a more than four-month low.