Oil prices edged up on Tuesday on concerns about possible supply disruptions in the Middle East, but a weaker demand outlook kept a lid on gains, helped by a vow by the International Energy Agency (IEA) to keep global markets adequately supplied. Brent crude LCOc1 futures climbed 29 cents, or 0.5%, to $63.55 a barrel by 0643 GMT. The international benchmark rose more than 1% in the previous session, following Iran’s seizure of a British tanker last week that stoked fears of supply disruptions from the energy-rich Gulf. West Texas Intermediate (WTI) crude CLc1 futures were up 20 cents, or 0.4% at $56.42 per barrel. “Downward revisions on global oil demand, along with rising challenges in the macroeconomic environment, have capped bullish gains […]