When Apple posts second-quarter earnings today, don’t expect a blowout. Wall Street certainly isn’t. The eager anticipation that once preceded Apple’s quarterly earnings reports has turned to apprehension following a steep plunge in the company’s stock price over the past seven months. And the question troubling many minds today is not whether Apple will exceed analyst expectations, but if it will even manage to exceed its own. Since reaching an all-time high of $702.10 last September, Apple’s stock has charted a precipitous decline, one that sheared about $280 billion off the company’s market capitalization.