(Updates from 11:37 a.m. ET with closing information.)

NEW YORK ( TheStreet) -- BlackBerry ( BBRY ) shares rose 4.61% to $10.21 following news that it was exploring "strategic alternatives."

In a press release this morning, the company announced that its Board of Directors had formed a committee, which includes CEO Thorsten Heins, "to explore strategic alternatives to enhance value and increase scale in order to accelerate BlackBerry 10 deployment." Such alternatives could include, the announcement said, "joint ventures, strategic partnerships or alliances, a sale of the Company or other possible transactions."

The chairman of the new committee, Timothy Dattels, said in the press release, "Given the importance and strength of our technology, and the evolving industry and competitive landscape, we believe that now is the right time to explore strategic alternatives." Heins added, "We continue to see compelling long-term opportunities for BlackBerry 10, we have exceptional technology that customers are embracing, we have a strong balance sheet and we are pleased with the progress that has been made in our transition."

BlackBerry has struggled with a lagging market share, losing to rivals Apple and Samsung. Its shares have fallen nearly 20% year-to-date.

Apple ( AAPL ) shares rose 2.48% to $465.72 amid rumors of an imminent new iPhone release.

AllThingsD reported Monday that Apple would unveil its next iPhone on September 10. The company is rumored to announce a lower-range iPhone along with updates on its new iOS 7. The new phone may also contain a fingerprint sensor, given its $356 million acquisition of AuthenTec, a fingerprint security company, in July 2012.

Tesla ( TSLA ) shares dropped 2.89% to $148.58 after it received an analyst downgrade.

Lazard Capital Markets analyst Aditya Satghare downgraded the stock to "neutral" from "buy," citing a more limited risk-reward. Writing that he saw "limited upside in the stock even giving Tesla the benefit of flawless execution to become a 'Porsche' over the coming decade," he argued that further growth on the stock would depend on its ability to expand overseas and approximately double its volumes. The feasibility of such expansion is unclear "until Tesla launches the Gen 3 in 2016/2017."

The electric car manufacturer's stock's risks include "slower-than-expected adoption of electric vehicles, recalls with components or systems, unsatisfactory yields/challenges during production ramp-up, and increased competition."

Tesla shares soared last week following strong second-quarter earnings far in excess of analysts' expectations.

Closing prices: BBRY jumped 10.5% to $10.78, AAPL rose 2.8% to $467.36 and TSLA dropped 3.7% to $147.88.

-- Written by Laura Berman in New York

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