Research In Motion climbed the most in more than three months as an analyst said the company’s demonstration of its PlayBook tablet computer suggests it may be a credible rival to Apple Inc.’s iPad.

Investors are beginning to understand the importance of the company’s tablet, Tero Kuittinen, an analyst at MKM Partners LP, said yesterday in a research note. RIM rose $3.04, or 5.9 percent, to $54.76 in Nasdaq trading.