The Nasdaq was down 0.75% to 2,898.4 in midday trading, while the Dow Jones Industrial Average fell 1.27% to 12,806.45.

The S&P 500 was off 1.23% to 1,358.29.

The yield on a 10-year treasury bond was down 4.74% to 1.47%.

The price of gold fell 1.02% to $1,590.90 per ounce.

Irvine-based laser maker Newport Corp.’s shares were up 7.8% to $11.86 a day after the company reported missed revenue and profit in line with analyst expectations for the June quarter. Newport Corp. had a recent market capitalization of $464 million.

The Ensign Group Inc.’s shares rose 5.12% to $28.95 to a recent market value of $618 million a day after increasing its earnings guidance for the full year. The Mission Viejo based skilled nursing and assisted living services provider said on Wednesday it had acquired two skilled nursing facilities in Idaho in addition to one in Escondido.

Newport Beach-based patent licensing company Acacia Research Corp.’s shares were down nearly 10% to $24.19 to a recent market value of $1 billion. Acacia’s shares have fallen since the company entered into a settlement agreement with Citigroup Inc. earlier this week.

Masimo Corp. of Irvine’s shares were off 7.78% to $20.58 after lowering its profit guidance for the year as a result of its recent purchase of Sweden-based Phasein AB. The Irvine-based patient monitoring device maker had a recent market value of $1 billion.