By Ryan Vlastelica
NEW YORK (Reuters) - Tesla Motors Inc
Elon Musk, CEO of the electric car company, wrote on TWITTER (TWTR.NY)that it was "about time to unveil the D and something else."
An image that accompanied the tweet suggested the unveiling might include a new vehicle model.
Shares were up 3 percent to $247.50 before the bell. The stock has rallied about 60 percent in the year to date, building on last year's surge of more than 340 percent.
Twitter Inc
"Twitter is a primary beneficiary of the shift toward mobile advertising ... and we are increasingly confident in the company?s ability to grow users over time," the firm wrote in a note to clients.
Futures snapshot at 0741 EDT:
* S&P 500 e-minis
* Nasdaq 100 e-minis
* Dow e-minis <1YMc1> were up 11 points, or 0.07 percent, with 24,397 contracts changing hands.
(Editing by Bernadette Baum)