Kathmandu. After US President Donald Trump postponed the planned attack on Iran's infrastructure, oil prices per barrel have fallen by more than $4 in the international market. According to Reuters, by 11:52 PM GMT on Sunday, Brent crude oil price had fallen by $4.08, or 4.64 percent, to $83.85 per barrel. Similarly, US West Texas Intermediate crude oil price had fallen by $4.01, or 4.74 percent, to $80.66 per barrel.Last month, prices of both types of crude oil had increased by more than 20 percent after the US resumed airstrikes on Iran and Tehran's army attacked several oil-carrying ships in...