Up almost 28% since the start of the year, General Motors (NYSE: GM) stock has significantly outpaced the S&P 500 index's 7.1% gain. And the stock's run isn't over yet, at least according to Bernstein analyst Daniel Roeska.

The performance has many GM stock analysts racing to overhaul targets. Revenue totaled $43.01 billion, up from $40 billion a year ago and surpassing FactSet's call for $41.94 billion. The iconic automaker earned $2.62 per share for the quarter, up from $2.21 a year ago, beating the FactSet consensus of $2.13 per share.

Responding to what he called a "provocative question," the Amazon ( AMZN) chief executive explained the secret to the e-commerce giant's resilience in his annual letter to shareholders. Jassy listed several reasons for Amazon's 30-year success story,