Nasdaq

The stock exchange received a deluge of data that overwhelmed its systems and shut down trading for three hours, last week.

The tech-heavy exchange shut down at around 12:14 p.m. ET due to a problem in a data feed.

The social media giant's debut on Wall Street one year ago ran into problems. Trades were delayed and some investors lost money. The Securities and Exchange Commission blames NASDAQ's "poor systems and decision-making."

Top stories include reports of a new massacre of civilians in Syria; and Defense Secretary Leon Panetta makes an unannounced visit to Pakistan and expresses frustration with that country.

The Nasdaq stock exchange will pay $40 million in compensation for troubled trades that occurred during Facebook's initial public offering. Nasdaq clients lost millions of dollars because of computer glitches. The opening trade was delayed by more than 30 minutes, and many investors were unsure if their trades had gone through.

After its much-ballyhooed initial public offering on Friday, Facebook's stock ended 11 percent down.

With an initial market capitalization of more than $100 billion, Facebook could have a distorting effect on some mutual funds, at least in the short term.

The Dow registered its highest reading in close to four years.