Stock Market Power Rankings: Apple Cracks

Each week, I'm ranking the biggest companies that trade on U.S. exchanges based on their size ( market capitalization), momentum (total return over the past year), and recent news. Before we get to the rankings, a quick word on a major player.

It's not just Sir Isaac Newton who learned something from a falling apple. Investors in Apple (NASDAQ: AAPL) took a 10% hit on Wednesday after the tech giant confirmed sluggish iPhone sales trends. Apple now sees $84 billion in revenue for its recently concluded fiscal first quarter.

Apple was eyeing $89 billion to $93 billion for the holiday-fueled quarter just two months ago, and even that outlook concerned investors. It would've been a marginal uptick from the $88.3 billion from a year earlier, but now Apple is bracing investors for an actual year-over-year decline.