The IPO of CommScope Holding Co is expected to reap USD800 million. Commscope Holding Co, the telecommunications equipment firm, had set pricing terms for its IPO.

Spinal medical device company LDR Holding would hold an IPO over five million shares of common stock this week.

Russian payment transfer company QIWI announced floating an additional 8.2 million shares following 12.5 American depository shares it had floated earlier this year.

US regulators met with the stock exchange operators to talk about backing up the Nasdaq stock quotes processor which malfunctioned last month.

Facebook Inc. stock had reached another milestone following a rocky debut on Wall Street last year. On Wednesday, the shares of social media giant Facebook Inc.

Asset managers questioned the sufficiency of the communications efforts undertaken by Nasdaq when trading halts during technological crisis.

The US Securities and Exchange Commission called rival exchange operators Nasdaq and NYSE to give details on the three hour trading halt which occurred last week.

All trading on Nasdaq were halted last Thursday after the stock exchange encountered a technical issue during midday.

Inventor John Levine of Nasdaq's exchanges systems said that the stock markets needed to be designed properly following the system breakdown yesterday which halted trading for three hours.

Bats Global Markets Inc. and Direct Edge Holdings LLC had been in merger discussions that would create two of the biggest stock exchanges in the US.