Skip to content
Subscriber Only

BlackBerry Declines After Move to Open Up BBM Messaging

BlackBerry fell the most in a week after announcing plans to open up its BBM instant-messaging system to other smartphones, a move that loosens the company’s grip on one of its most valuable services.

The stock dropped 4 percent, the biggest one-day decline since May 7. Shares of Waterloo, Ontario-based BlackBerry have climbed 28 percent this year, fueled by optimism over the company’s comeback plan.