The S&P 500 was up 0.1% to 2,129. 94 in midday trading.

The Dow Jones Industrial Average was up 0.2% to 18,112.94.

The Nasdaq was up 0.3% to 5,222.91.

The yield on a 10-year Treasury bond was up 1% to 2.37%.

The price of gold was down 2.2% to $1,106.

HEALTHCARE

Laguna Hills-based Glaukos Corp. was down about 1% in midday trading to $31.70 and a $962 million market cap. Five analysts initiated coverage on the glaucoma device maker’s shares with four positive and one neutral ratings at price targets slightly above where the stock is now trading. Glaukos went public last month.

Costa Mesa-based Nemus Bioscience Inc. was down 19% to 89 cents and a $14 million market cap. The medical marijuana company’s shares are down by about half since last week on heavier than normal trading volume.