12:31 PM EDT, 07/08/2025 (MT Newswires) -- US equity indexes traded mixed after President Donald Trump said that tariffs against a broad group of trading partners would take effect Aug. 1, with no extensions granted.

The Nasdaq rose 0.3% to 20,457.1, the Dow Jones Industrial Average fell 0.2% to 44,337.4, and the S&P 500 was little changed at 6,228.49 after midday on Tuesday. Among sectors, energy led the gainers, and utilities paced the decliners.

In economic news, the National Federation of Independent Business' monthly Small Business Optimism Index fell to 98.6 in June from 98.8 in May. The gauge rose from 91.5 a year earlier.

Redbook US same-store sales last week rose 5.9% from a year earlier, following after a 4.9% increase in the prior week.

In company news, Amazon's ( AMZN ) four-day Prime Day event kicked off Tuesday, and sales fell almost 14% in the first four hours from a year earlier, Bloomberg reported, citing Momentum Commerce data. Amazon ( AMZN ) shares fell 1.2%.

GlobalFoundries ( GFS ) shares rose 6.6%, the biggest gain on the Nasdaq after the company agreed to acquire MIPS, a supplier of AI and processor IP.

Hershey (HSY) appointed Kirk Tanner as chief executive officer, effective Aug. 18. He most recently served as CEO of Wendy's (WEN). Hershey shares fell 3%, and Wendy's lost 0.4%.

The US 10-year Treasury yield rose 2.4 basis points to 4.42%. The two-year rate rose 0.6 basis point to 3.91%.

The US Dollar Index edged up 0.2% to 97.66.

West Texas Intermediate crude oil rose 0.6% to $68.36 per barrel.

Gold fell 1.1% to $3,306.9 per ounce, while silver declined 0.9% to $36.56 per ounce.