Oil futures saw a slight loss on Friday, ahead of a potential deal between Iran and the West that could lift sanctions on Iran and result in the addition of more oil to the global market. August crude CLQ5, -0.08% lost 7 cents, or 0.1%, to settle at $59.63 a barrel on the New York Mercantile Exchange. The contract fell 0.6% for the week, but compared with the July contract, which expired on Monday, prices saw a weekly gain of 2 cents.
Read the full story: Oil marks third straight loss as Iran deal deadline nears
