Apple, Inc. stock closes at $533, highest point since start of 2013

The company's stock is now up slightly from the beginning of 2013 for the first time since plunging $100 per share in January and remaining in the low $400s throughout most of the spring and summer.

Apple took advantage of its acutely low stock price in a buyback program that floated a bond offering to buy back 47 million shares.

The 36 million shares Apple bought back in the June quarter at an average of $444 per share would now cost an additional $3.2 billion to acquire again at the current price.