Tech Five: Fitbit continues to climb

Fitbit hit the ground running during its first day on Wall Street.

Investors' pulses were racing Thursday, as the stock surged 50% from its initial price of $20.

Let's take a look at the tech stocks to watch Friday:

Fitbit (FIT)

The wearable health-tracker had quite the debut on Wall Street Thursday, with more than 40 million shares sold during regular trading hours. As of Friday morning trading, shares were up around 5%, to $31.07.

Twitter (TWTR)

In an attempt to attract more users, Twitter will offer channels for live events right on the feed. The new feature, dubbed Project Lighting, will curate relevant tweets, photos and videos from live events. It will be offered to users on a special "Live" tab.

Sony (SNE)

Wikileaks dumped 276,394 documents of Sony's sensitive data to the public on Thursday. The data hacking revealed everything from employees' private medical information to sensitive celebrity details.

Nokia (NOK)

Nokia is getting back into the mobile phone business, according to CEO Rajeev Suri. The company, which was once the world's biggest mobile phone maker, plans to start designing and licensing handsets again once an existing agreement with Microsoft permits it to in 2016.

Microsoft (MSFT)

Microsoft had a strong showing at this year's Electronic Entertainment Expo, which closed its doors Thursday. The company unveiled several new video games for the holiday lineup, and also announced an update to the Xbox One that will allow for backwards compatibility with games from the Xbox 360.