Applehas a lot of investors eating their words today.

“Its one of those stocks that everybody wants to bet against,” said chief investment strategist Brian Belski, of Oppenheimer. 

But the company's shares , whose price hit $500 for the first time on Monday, are up more than 20 percent year to date. And this is before Apple launches iTV.

“It deserves an ‘overweight’ [rating],” said Belski, while disclosing that Apple is Oppenheimer’s largest holding in its “large-cap core” portfolio.