The S&P 500 was down 0.7% in midday trading to 2,782.47.
The Dow Jones Industrial Average declined 1% to 25,089.48.
The Nasdaq fell about 0.7% to 7,557.83.
The yield on a 10-year Treasury bond dropped 1.3% to 2.24%.
The price of gold rose 0.3% to $1,281.
The price of oil fell 0.5% to $58.83 a barrel.
CalAmp Corp. (Nasdaq: CAMP) declined 10% to $11 and a $335 million market cap. Shares were downgraded to sell from neutral and its price target cut to $11 from $13 by Goldman Sachs, which likes the Irvine-based software maker’s telematics subscription business buts expects a cyclical slowdown in hardware producing a “challenging” environment for organic growth.
ChromaDex Corp. (Nasdaq: CDXC) in Irvine was down 7.2% to $4 and a $222 million market cap. The maker of nutritional ingredients saw shares fall about 5% yesterday but is still up about 30% year-to-date.