How low can they go?

Shares in BlackBerry maker Research In Motion — which has been losing investors and market share to Google’s Android and the Apple-made iPhone — sank to a seven-year low yesterday, falling 2.6 percent to $15.08.

Shareholders are expected to ramp up pressure on management of the Waterloo, Ont.-based firm, which The Street expects will detail the shortfalls in sales and forecasts during today’s fiscal third-quarter earnings call.