Oil tops $91 again: Brent hits five-week high as US-Iran conflict, Houthi threats jolt global markets

Interior Secretary Doug Burgum made some wild claims about energy savings during a Fox Business appearance on Monday as nationwide gas prices again hit $4 per gallon amid renewed fighting with Iran.

One of those cushions is America's Strategic Petroleum Reserve (SPR) which hit its lowest levels since 1983.

Oil prices fell in early trading on Friday but remained on track for weekly gains as the United States and Iran continued trading ​strikes.

Yields on the 10-year United States Treasury bills, for instance, are up nearly 60 basis points since the start of the war on Iran in late February to 4.6 percent on Monday.