Brent crude futures rose 3.1% to $116.72 a barrel, the highest since late April. WTI quotes added 3.8%, rising to $103.27 per barrel. According to CNBC, the price increase is caused by the fear of supply disruptions due to the escalation in the Middle East: the markets are reacting to the Houthi attacks on Saudi Arabian infrastructure and to possible US and Israeli attacks on Iran after the US congressional elections in November.