A major Japanese electronics maker approached First Majestic Silver Corp. for the first time last month seeking to lock in future stock, a sign of supply concerns that could boost the metal’s price ninefold, according to the best-performing producer of the metal.

“For an electronics manufacturer to come directly to us -- that tells me something is changing in the market,” said Keith Neumeyer, chief executive officer of First Majestic, the top stock in Canada and among its global peers this year. “I think we’ll see three-digit silver,” he said, predicting the metal could surge to $140 an ounce by as early as 2019.