NEW YORK (AP) -- Stocks that moved substantially or traded heavily Thursday on the New York Stock Exchange and the Nasdaq Stock Market:
NV Energy Inc., up $4.34 at $23.62
Berkshire Hathaway Inc.'s MidAmerican Energy utility said that it will buy the electric and natural gas company for $5.6 billion.
Express Inc., up $2.41 at $21.20
The clothing company said that its first-quarter net income fell 23 percent, but its results still topped analysts' estimates.
Big Lots Inc., down $3.45 at $34.93
The discount retailer said that its first-quarter net income fell 21 percent and it lowered its revenue forecast for the year.
Harmony Gold Mining Co. Ltd., up 35 cents at $4.14
The rising price of gold lifted shares of Harmony Gold, a South Africa-based gold mining company.
Facebook Inc., up $1.23 at $24.55
A Jefferies analyst upgraded the social media's stock to a "Buy" rating, saying that video ads could become its next big business.
Fred's Inc., up 83 cents at $16.03
The discount retailer said that its first-quarter net income rose 9 percent, helped by a modest rise in sales and lower costs.
Sanderson Farms Inc., up $2.61 at $68.60
The poultry processing company said that its second-quarter net income rose 2 percent thanks to higher demand for its products.
Clearwire Corp., up $1.02 at $4.50
Satellite TV operator Dish Network said that it raised its bid for the wireless network operator, valuing it at $6.9 billion.