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Midday movers: Twitter, Tesla, J.C. Penney & more

Take a look at some of Thursday's midday movers:

J.C. Penney - The retailer gained after a MasterCard Advisors SpendingPulse report that pointed to a sharp increase in holiday spending.

EBay - Shares declined after research firm ChannelAdvisor reported a slowdown in the online auctioneer's sales.

Tesla - Shares of the manufacturer of electric cars climbed after a China Daily report that it would attempt to open additional showrooms in China next year.

Twitter - Shares of the social network rallied, continuing a climb that Bloomberg reported comes on the belief the company would draw additional advertising revenue.

Blackberry - Shares of the struggling company fell after the Wall Street Journal reported co-founder Michael Lazaridis dropped an effort to buy the smartphone maker.

T-Mobile US - Shares of the wireless carrier rose after Reuters cited sources close to the matter saying Japan's SoftBank was in talks to acquire the company.

(Read More: See CNBC's Market Insider Blog)

—By CNBC's Kate Gibson.

Questions? Comments? Email us at marketinsider@cnbc.com