Donald Yacktman, whose US$19 billion mutual-fund firm has outperformed peers by picking undervalued stocks, is leading a rush of investors betting Research In Motion Ltd. and its BlackBerry smartphone can recover.

Yacktman Asset Management bought 12.2 million RIM shares last quarter, doubling the firm’s stake to about US$252 million, according to data compiled by Bloomberg. Yacktman sees value in the BlackBerry’s 80 million users worldwide, its physical keyboard and the promise of a new operating system, even as the phone’s U.S. market share drops to less than 2% from 8.5% a year ago.

Read more: FinancialPost