What is the fine-grained topic of the following text: The West Texas Intermediate for August delivery increased $0.20 to settle at $74.14 a barrel on the New York Mercantile Exchange, while Brent crude for September delivery was up $0.46 dollar to close at $77.76 a barrel on the London ICE Futures Exchange, Xinhua reported. Only return the topic.
Oil prices increase on New York and London exchanges