Nintendo Co., which has not yet thrown itself fully into the world of mobile gaming, is giving people a good idea of what a smartphone hit looks like with the success of ¡°Pokemon Go.¡±

The company has added more than $7 billion in market value since last week¡¯s debut of a new smartphone app for its Pokemon fantasy monster character franchise. The game, which lets users track down virtual monsters in their vicinity, has topped the free-to-download app charts for Apple in the U.S. and Australia since its release Thursday, according to market researcher App Annie.

Nintendo¡¯s shares responded with their biggest intraday jump since at least 1983, when the stock started trading in Tokyo, climbing as much as 25 percent Monday. Investors are taking Pokemon¡¯s early success as a sign of things to come for a company that has yet to commit the most popular characters from its Mario or Zelda franchises to mobile gaming apps.