The S&P 500 declined 0.3% to 3,962.50 in midday trading Monday.
The Dow Jones Industrial Average rose 0.02% to 33,078.46, while the Nasdaq fell 0.9% to 13,026.41.
Crude oil was up 0.02% to $60.98.
Gold was down 1.2% to $1,711.90.
The yield on a 10-year Treasury increased 1.8% to 1.69%.
Newport Beach-based Clean Energy Fuels Corp. (Nasdaq: CLNE) fell 5% to $12.83. OC’s largest public clean technology company, with a recent market cap of $2.6 billion, is up about 64% from the start of the year.
Alignment Healthcare Inc. (Nasdaq: ALHC), with a market cap of $3.3 billion, rose 2.3% to $17.71. The Orange-based insurer began publicly trading on Friday with 27.2 million shares available for sale, which included 5.5 million from existing shareholders.