NYSE

Sometimes stock movements are the result of thoughtful, well-reasoned decisions, and sometimes...well, you just have to scratch your head. Here's a roundup of five of the most foolish stock moves from the past week.

When will Groupon and Living Social go public...and how have the sites already changed the way older companies do business? With high profit margins leading to steep valuation, it looks like the group coupon market is poised to explode!

Last week, oil's ascent trumped a raft of healthy U.S. economic reports. With a relatively light slate of economic data scheduled this week, oil prices and political turmoil in the Middle East could play an even larger role in the trading sessions ahead. [Video]

During a volatile week, stocks bounced between Mideast turmoil and generally strong economic reports. Even with the jobless rate's surprising drop, equities ended on a down note. Still, stocks eked out a tiny overall gain on the week. [Video]

The market suffered its biggest swoon since August last week as chaos swept Libya and oil prices hit multiyear highs. With the geopolitical landscape uncertain for the foreseeable future, don't be surprised if stocks come under further selling pressure in the days ahead. [Video]

It was a rough (even if short) week on Wall Street. But at least the Dow ended higher after losing more than 300 points in the previous three days. Some month-end bargain-hunting also helped stem the slide. [Video]

The market heads into a busy week of economic reports and the end of fourth-quarter earnings season primed for yet more gains. After all, if traders could sustain the rally through 18 days of Egyptian turmoil, a return to keying on fundamentals bodes well for the bulls. [Video]