Stocks moved sharply lower at the start of trading on Friday, as renewed concerns about the European debt crisis weighed on the markets once again. The major averages all showed notable moves to the downside after ending the previous session modestly higher.

Wall Street seems to giving up the optimism that has characterized trading for the past couple of sessions. The optimism came about due to encouraging results of a series of auctions conducted by some core eurozone nations. The auctions even served to neutralize the impact of a few surprisingly disappointing U.S. data. Amid the nervousness, [...]