Investors can buy this steadily growing AI stock at an attractive valuation right now.The proliferation of artificial intelligence (AI) technology has given many technology companies a boost over the past 18 months, and Opera (OPRA -0.67%) is one of them -- share prices of the company, which is known for its mobile and personal computer (PC) browsers, have shot up 146% during this period.However, there has been a sharp pullback in Opera stock more recently. The stock hit a 52-week high in mid-July last year ...