The company's high R&D expenses could suggest it has something lucrative on the horizon.Apple (AAPL -0.34%) had a slow start to the year, with its shares down 12% at the beginning of May. Dwindling product sales, poor market conditions, and an uncertain position in the budding artificial intelligence (AI) market caused investors to pull back.However, the tech giant has turned things around since then, with its stock soaring 34% since May 1. Apple won back Wall Street by beating expectations in its third qua ...