12 Biggest Mid-Day Losers For Monday

Aptose Biosciences Inc APTO shares tumbled 27.4 percent to $0.951 after the company disclosed that it will temporarily delay clinical activities with APTO-253 and will prioritize resources for CG'806 with AML patients.
DryShips Inc. DRYS shares dropped 25.7 percent to $6.00. DryShips shares have dropped 95.86 percent over the past 52 weeks, while the S&P 500 index has gained 21 percent in the same period.
QUALCOMM, Inc. QCOM shares fell 14 percent to $54.11. On Friday, Apple Inc. AAPL disclosed that it is suing Qualcomm over licensing practices. Nomura downgraded Qualcomm from Buy to Neutral and lowered the price target from $80.00 to $70.00.
Avianca Holdings SA (ADR) AVH shares dropped 11.8 percent to $8.34.
SenesTech Inc SNES shares declined 9.8 percent to $7.95. SenesTech and Neogen reported that they have mutually agreed to terminate Neogen technology license.
ParkerVision, Inc. PRKR dropped 9 percent to $2.34. ParkerVision shares have slipped 1.15 percent over the past 52 weeks, while the S&P 500 index has gained 21 percent in the same period.
Nordic American Tanker Ltd NAT shares declined 8 percent to $8.61. Nordic American Tankers declared a cash dividend of $0.20 per share for the fourth quarter.
HealthStream, Inc. HSTM dropped 7.7 percent to $21.00. First Analysis downgraded HealthStream from Equal-Weight to Underweight.
Perceptron, Inc. PRCP fell 7.3 percent to $6.21. Perceptron is expected to release Q2 financial results on Monday, February 6.
Workiva Inc WK slipped 6 percent to $12.50. Morgan Stanley downgraded Workiva from Overweight to Equal-Weight.
Kornit Digital Ltd KRNT shares dropped 4.8 percent to $16.90 after announcing a 7 million share offering.
Travelport Worldwide Ltd TVPT shares declined 3.1 percent to $13.71. Morgan Stanley downgraded Travelport Worldwide from Overweight to Equal-Weight.