NEW YORK_Stocks that moved substantially or traded heavily Wednesday on the New York Stock Exchange and Nasdaq Stock Market:

NYSE:

Sprint Nextel Corp., down 54 cents at $4.05

The wireless provider said its second-quarter loss widened as more subscribers left, including those signing pricey yearly contracts.

Massey Energy Co., up $1.55 at $24.29

The coal producer is rehiring miners, saying demand from Asia is growing, after posting a better-than-expected profit on Tuesday.

Conseco Inc., up 68 cents at $2.58

The insurer expects a profit in the second quarter compared with a year-ago loss, due to much smaller losses from investments.


McKesson Corp., up $4.18 at $51.01

The drug distributor raised its guidance for the year above Wall Street expectations, and a R.W. Baird analyst upgraded the stock to "Buy."

Aflac Inc., down $1.15 at $35.45

A Citi analyst downgraded the insurer to "Hold," saying earnings growth will slow over the next three years as investment losses deepen.

Dreamworks Animation SKG Inc., up $2.45 at $31.13

The animated movie studio expects lower costs as it boosts movie production and is able to advertise at cheaper rates.

NASDAQ:

Yahoo Inc., down $2.08 at $15.14

After years of talks, the Internet company is forming a search partnership with Microsoft Corp. but without an upfront payment.

THQ Inc., down $1.60 at $6.81

The video game publisher expects sales to drop by more than a third in its current quarter due to the lack of new game releases scheduled.