Markets Right Now: S&P 500 notches 4th straight weekly gain

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

4 p.m.

Technology and health care companies led U.S. stocks higher, giving the S&P 500 index its fourth straight weekly gain.

The rally Friday came as investors grew hopeful that talks between the U.S. and China would defuse a costly trade war between the two countries.

Wayfair, an online furniture seller, vaulted 27.9 percent after reporting results that topped Wall Street's forecasts.

Kraft Heinz plunged 27.5 percent after reporting huge write-downs to its main brands, slashing its dividend and disclosing an investigation by securities regulators.

The S&P 500 rose 17 points, or 0.6 percent, to 2,792.

The Dow Jones Industrial Average rose 181 points, or 0.7 percent, to 26,031. The Nasdaq added 67 points, or 0.9 percent, to 7,527.

Bond prices rose. The yield on the 10-year Treasury fell to 2.65 percent.

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11:45 a.m.

Technology and health care companies led stocks higher in midday trading, erasing some of the market's losses from a day earlier.

The benchmark S&P 500 is on track Friday for its fourth-straight weekly gain.

Wayfair vaulted 31.8 percent after reporting results that topped Wall Street's forecasts.

Kraft Heinz plunged 27 percent after reporting huge write-downs on its main brands, slashing its dividend and disclosing an investigation by federal securities regulators.

The S&P 500 index rose 15 points, or 0.6 percent, to 2,790.

The Dow Jones Industrial Average rose 162 points, or 0.6 percent, to 26,015. The Nasdaq added 57 points, or 0.8 percent, to 7,517.

Bond prices rose. The yield on the 10-year Treasury note fell to 2.66 percent.

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9:35 a.m.

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

Microsoft rose 1.2 percent in the first few minutes of trading Friday, and Boston Scientific rose 1 percent.

Kraft Heinz plunged 27 percent after disclosing a federal investigation into the company's procurement operations and slashing the value of its Oscar Mayer and Kraft brands.

The S&P 500 index rose 7 points, or 0.3 percent, to 2,782.

The Dow Jones Industrial Average rose 102 points, or 0.4 percent, to 25,956. The Nasdaq added 24 points, or 0.3 percent, to 7,485.

Bond prices rose. The yield on the 10-year Treasury note fell to 2.66 percent.