The S&P 500 in midday trading increased 0.3% to 2,792.69.
The Dow Jones Industrial Average fell 0.4% to 25,543.94.
The Nasdaq was up 0.6% to 7,600.27.
The yield on a 10-year Treasury bond decreased 1% to 2.61%.
The price of gold rose 0.5% to $1,298.
The price of a barrel of oil increased 0.3% to $56.98.
Terra Tech Corp. (OTC: TRTC) in Irvine surged 15% to $1.68 and a $156 million market cap. Shares of the Irvine-based cannabis products maker are trading at more than four times their daily average. The company is scheduled to report fourth quarter earnings Thursday.
BioCorRx Inc. (OTC: BICX) in Anaheim fell 5.6% to $4.25 and an $11 million market cap. Shares in the alcohol and opioid addiction treatment program developer are down 15% since hitting a 52-week high of $5 on March 7.