Oil prices fell about 4% to a one-week low on Tuesday as traders shrugged off the latest U.S. sanctions campaign against Iran, viewing economic pressure as posing less risk to oil supplies than a military escalation.Brent crude futures were down $3.83, or 4.2%, to $88.34 a barrel by 11:44 a.m.<p><p>https://www.marinelink.com/news/oil-prices-drop-traders-dismiss-us-542426</p></p>