03:58 PM EDT, 08/07/2026 (MT Newswires) -- Energy stocks were lower late Friday afternoon, with the NYSE Energy Sector Index falling 1.1% and the State Street Energy Select Sector SPDR ETF (XLE) dropping 1.3%.

The Philadelphia Oil Service Sector Index was shedding 1.4%, and the Dow Jones US Utilities Index rose 0.8%.

In geopolitical news, Iranian lawmakers are debating the wording of a proposed deal with Oman on the Strait of Hormuz, with President Donald Trump insisting an agreement is getting closer, Bloomberg reported. Iran's Deputy Foreign Minister Kazem Gharibabadi said earlier this week that an understanding with Oman had been reached "in principle," and state TV cited one lawmaker on Friday as saying the final text and details of an agreement with Muscat will be announced "soon," according to the news report.

Front-month West Texas Intermediate crude oil slid 0.5% to $76.92 a barrel, and the global benchmark Brent crude contract fell 0.7% to $81.95 a barrel. Henry Hub natural gas futures gained 1% to $2.67 per 1 million BTU.

In corporate news, Vistra's ( VST ) shares were down 0.3% after it reported Q2 results that fell short of consensus expectations.

Calumet (CLMT) shares fell 6% after the company reported Friday it narrowed its Q2 loss to $1.09 per basic share, from a loss of $1.70 a year earlier. Analysts expected earnings of $0.07.

Oklo ( OKLO ) shares jumped past 14% after it posted better-than-expected revenue for Q2.

Energy Vault ( NRGV ) shares surged 17% after it said Friday it signed an agreement to deploy 1.25 gigawatts of integrated power infrastructure for hyperscaler AI data centers, with the initial deployment backed by a customer contract in Texas.