The latest on developments in financial markets (All times local):

4:00 p.m.

Another dive in energy stocks offset gains for health care and technology companies, leaving major U.S. indexes mostly lower.

Bond yields held steady Wednesday, while stocks in mainland China got a small boost after they got the OK to join a widely followed index of emerging-market stocks.

Rig operator Transocean dropped 5 percent, and AT&T fell 1.3 percent. Advanced Micro Devices soared 10.6 percent.

Eight of the 11 sectors in the Standard & Poor's 500 index fell.

The S&P 500 lost 1 point to 2,435.

The Dow Jones industrial average gave up 57 points, or 0.3 percent, to 21,410. The Nasdaq composite rose 45 points, or 0.7 percent, to 6,233.

The yield on the 10-year Treasury was unchanged at 2.16 percent.

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11:45 a.m.

Stock indexes were mixed in midday trading on Wall Street as gains for technology and health care companies were outweighed by losses in several other sectors.

Energy and phone companies had the biggest losses Wednesday. Chevron lost 1 percent and AT&T fell 0.9 percent.

The Standard & Poor's 500 index rose a fraction of a point to 2,437.

The Dow Jones industrial average fell 14 points, less than 0.1 percent, to 21,453. The Nasdaq composite rose 34 points, or 0.6 percent, to 6,222.

More stocks were falling than rising on the New York Stock Exchange.

Bond prices fell. The 10-year Treasury yield ticked up to 2.17 percent.

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9:35 a.m.

Stocks are opening slightly higher on Wall Street, led by gains in health care and technology companies.

Software company Red Hat rose 8.5 percent in the first few minutes of trading Wednesday. Regeneron Pharmaceuticals rose 2.1 percent.

The price of crude oil was stable after taking a plunge a day earlier. U.S. benchmark crude was up 0.2 percent.

The Standard & Poor's 500 index rose 1 point to 2,438.

The Dow Jones industrial average was little changed at 21,476. The Nasdaq composite rose 19 points, or 0.3 percent, to 6,206.