NEW YORK -- Stocks that moved substantially or traded heavily on Thursday:
Qualcomm Inc., down $1.96 to $71.20.
The chipmaker gave investors a disappointing profit forecast as it faces the fallout from the U.S.-China trade war and weak demand.
Prudential Financial Inc., down $10.22 to $91.09.
The financial services company reported weak second quarter profit and its individual life insurance unit swung to a loss.
Yum Brands Inc., up $4.42 to $116.94.
The Taco Bell and Pizza Hut owner beat Wall Street's second quarter profit and revenue forecasts.
General Motors Co., down 19 cents to $40.15.
The auto maker blew past Wall Street's second quarter profit forecasts on strong sales of pickups and SUVs.
Abiomed Inc., down $73.69 to $204.87.
The maker of heart devices slashed its revenue forecast for the year as it expects a slow second quarter.
Kellogg Co., up $5.41 to $63.63.
The maker of Frosted Flakes and Pop Tarts beat Wall Street's second quarter profit forecasts.
Fitbit Inc., down 89 cents to $3.31.
The wearable device maker cut its revenue outlook for the year as it faces weaker sales for some of its smartwatches.
Western Digital Corp., up $1.62 to $55.51.
The maker of hard drives reported solid fiscal fourth quarter profit and said it expects the market for flash drives to improve.