The S&P 500 rose 0.2% to 3,697.69 during midday trading.
The Dow Jones Industrial Average increased 0.3% to 30,155.30.
The Nasdaq climbed less than 0.1% to 12,525.38.
The yield on a 10-year Treasury bond fell 1.9% to 0.91%.
The price of gold increased 0.5% to $1,874.90.
The price for a barrel of oil dropped 0.4% to $45.58.
Newport Beach-based Clean Energy Fuels Corp. (Nasdaq: CLNE) rose 5.2% to $4.43 per share for a market cap of $873 million. Financial analysis website TheMotleyFool.com said the prospect of rising oil prices due to last week’s OPEC production decision also pushes up the value of the shares of alternative fuel companies.
Axonics Modulation Technologies (Nasdaq: AXNX) rose 3.3% to $45.20 per share for a market cap of $1.8 billion. The company last week published strong results of a study of its fecal incontinence implantable device, sending the share price up 6.3% since the announcement.