The Financial Post reports in its Friday edition that investors are growing increasingly optimistic about Amazon's position in artificial intelligence, lighting a fire under the stock and sending the company's market capitalization soaring toward the rarefied $3-trillion level (all figures U.S.). "We have a lot of confidence that Amazon's AI strategy is working, and that it will continue to pay dividends in the form of strong growth over the coming years," said Stephen Lee at Logan Capital Management, which owns Amazon shares. The stock has been on a tear since bottoming on March 27, with its 36-per-cent gain in that span making it the fourth-largest point contributor to the S&P 500 Index, accounting for 7.4 per cent of the benchmark's 17-per-cent advance through Wednesday's close. Amazon's 27-per-cent leap in April marked its best month since 2007. The company's market value is $2.9-trillion after adding $432-billion this year. If the rally goes further, it will join Nvidia, Alphabet, Apple and Microsoft in the exclusive group of companies that are worth more than $3-trillion. Amazon's resurgence comes after an extended period of underperformance. The market over all sees that AI demand continues to be robust.