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

4:00 p.m.

Stocks erased much of an afternoon loss and ended mixed after the Republican-backed health care reform bill was pulled because of a lack of support in Congress.

The market still closed out its worst week since the election Friday.

Several health care companies rose as the bill's prospects worsened throughout the day. Hospital operator Community Health Systems soared 9.7 percent.

The Standard & Poor's 500 slipped 2 points, or 0.1 percent, to 2,343.

The Dow Jones industrial average lost 59 points, or 0.3 percent, to 20,596. The Nasdaq gained 11 points, or 0.2 percent, to 5,828.

More stocks fell than rose on the New York Stock Exchange.

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11:45 a.m.

U.S. stocks are higher in midday trading as technology companies and banks climb.

Chipmaker Micron Technology surged 9.3 percent Friday after reporting results that were much better than analysts were expecting. Wells Fargo gained 1.1 percent.

Investors were keeping a close eye on Washington, where a vote was expected later in the day on the Republican-backed health care reform bill.

Stocks are on track for their biggest weekly loss of 2017.

The Standard & Poor's 500 index rose 7 points, or 0.3 percent, to 2,353.

The Dow Jones industrial average gained 25 points, or 0.1 percent, to 20,681. The Nasdaq composite gained 36 points, or 0.6 percent, to 5,853.

Bond prices edged higher. The yield on the 10-year Treasury note fell to 2.41 percent.

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9:35 a.m.

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

Chipmaker Micron Technology surged 11 percent in early trading Friday after reporting results that were much better than analysts were expecting.

Investors were keeping a close eye on Washington, where a vote was expected later in the day on the Republican-backed health care reform bill.

The Standard & Poor's 500 index rose 5 points, or 0.2 percent, to 2,351.

The Dow Jones industrial average gained 38 points, or 0.2 percent, to 20,695. The Nasdaq composite gained 26 points, or 0.5 percent, to 5,843.