The S&P 500 was up 0.4% in midday trading to 2,810.26.
The Dow Jones Industrial Average rose 0.3% to 25,126.02.
The Nasdaq ticked 0.5% higher to 7,848.06.
The yield on a 10-year Treasury bond was down 0.1% to 2.86%.
The price of gold dropped 1% to $1,228.
Avid Bioservices Inc. (Nasdaq: CDMO) in Tustin was up 23% to $5.49 and a $305 million market cap. The contract drugmaker beat expectations on quarterly revenue. Shares have risen about 60% in the last three weeks.
ChromaDex Corp. (Nasdaq: CDXC) in Irvine was up 3.3% to $4.33 and a $238 million market cap. The nutritional supplement maker is scheduled to report quarterly results in three weeks.
Kush Bottles Inc. (OTC: KSHB) in Santa Ana was down 5.3% to $4.50 and a $334 million market cap. Shares in the maker of packaging for cannabis products are down about 20% since it sold $36 million in shares in mid-June. The company is changing its name to KushCo Holdings Inc., effective Sept. 1.