The S&P 500 rose 0.61% to 1,884.18 in afternoon trading Wednesday.

The Dow Jones Industrial Average rose 0.83% to 16,510.59, while the Nasdaq rose 0.60% to 4,121.36.

The yield on a 10-year Treasury bond was up 1.20% to 2.54%.

The price of gold fell 0.49% to $1,288.30 per ounce.


Anaheim drug maker Questcor Pharmaceuticals Inc. fell about 2% to $91.25 for a market value of $5.4 billion. Mizuho lowered its rating on the company's stock from "buy" to "neutral."


Irvine healthcare software maker Quality Systems Inc. rose about 4% to $16 for a market value of $963.36 million. Analysts at RBC Capital upgraded the company's stock from "sector perform" to "outperform."