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The S&P 500 was up 0.4% in midday trading to 2,247.95.
The Dow Jones Industrial Average was up 0.2% to 19,792.05.
The NASDAQ was up 0.4% to 5,404.25.
The yield on a 10-year Treasury bond rose 0.3% to 2.45%.
The price of gold rose 1.0% to $1,166.
Irvine-based Quality Systems Inc. was up 2.9% to $13.53 and an $843 million market cap on moderate volume. The company makes software to help manage medical practices and offices.
Irvine-based ChromaDex Corp. was up 7.9% to $3.57 and a $138 million market cap. New York research investment firm Rodman & Renshaw Capital Group initiated coverage on the ingredients making company with a “buy” rating and a $6 price target.
Newport Beach-based chemicals maker American Vanguard Corp. was down 3.4% to $18.50 and a $546 million market cap on moderate volume.
Irvine-based Boot Barn Holdings Inc. was up 2.9% to $12.88 and a $342.5 million market cap. Los Angeles investment bank B. Riley & Co. upgraded the chain of western apparel stores to “buy” with a price target of $15.50.