How does this market deal with a two-day slide that sparked worries of a serious correction? It rallies, of course. A reassuring report about business confidence in Germany -- one of the few thriving economies in Europe -- convinced Wall Street that the global recovery hasn't been compromised. An optimistic Dow Jones Industrial Average (DJINDICES:^DJI) added just under 120 points, or 0.86%, to close at 14,000 on the dot.

Another major factor in today's bullishness came from impressive corporate earnings. And few earnings were more bullish than Hewlett-Packard's (NYSE:HPQ) results, which were robust enough to send the stock soaring 12.3%. Cost-cutting measures undertaken by CEO Meg Whitman seem to have made more of a difference than analysts imagined. For the time being, the admitted "turnaround" play seems to have quite the sharp turning radius. 

The only blue chip to lose more than 1% today, UnitedHealth Group (NYSE:UNH), ended as the Dow's biggest loser, slipping 1.4%. Though the stock was upgraded by Oppenheimer yesterday, a report from the U.S. Department of Health today sparked concerns that health insurance companies will be hurt by 2010's Affordable Care Act. The act requires requested increases of 10% or more in premiums to be reviewed by government regulators, and fewer such requests were made last year, the data show.

Outside the Dow, online streaming service Netflix's (NASDAQ:NFLX) stock fell 3.9%, two days after a 4.7% decline following news of a lawsuit against the company. The lawsuit claims that statements made last July by CEO Reed Hastings on the company's Facebook account misled the public about Netflix's growth prospects. Shareholders aren't enthused, especially since the SEC is also considering bringing a lawsuit.

Finally, shares of 3D Systems (NYSE:DDD) added 3.8% Friday, a day after a massive 8.4% slump. The 3-D printing company reports its quarterly results on Monday, and today's market seemed to think that yesterday's sell-off was overdone. With average earnings growth at nearly 100% per year over the last five years, this is the epitome of a high-growth, high-volatility stock.