CNBC World News

More than 4,500 people were detained by Russian authorities for participating in the protests, according to a monitoring group.

An anonymous author with ties to China says the country is growing increasingly authoritarian under President and General Secretary Xi Jinping.

Ben Kusin, whose dad co-founded the predecessor to GameStop in the 1980s, is an avid follower of the WallStreetBets forum on Reddit.

The call for sanctions comes after tens of thousands of demonstrators protested the poisoning and arrest of Navalny by Russian officials. 

The so-called "Cryptocurrency and Regulation of Official Digital Currency Bill" moves to "prohibit all private cryptocurrencies in India."

The David-vs.-Goliath premise in the GameStop saga is somewhat flawed.

GameStop mania took Wall Street by storm, thanks to a legion of retail traders glued to the WallStreetBets message board on Reddit.

Heightened speculative trading by retail investors continued to unnerve the market.

Moderna asked the FDA to allow it to put more doses of its Covid-19 vaccine in each vial to alleviate a bottleneck in manufacturing, a source tells CNBC.

In an email to customers on Friday, the company touted its ability to fix everything from dents and scratches to "suspension and axle damage"

The EU's vaccination program has been sluggish at best, and looking vulnerable to supply shortages.

January's jobs report and some big earnings are due in the week ahead, but Reddit traders may get more attention.

Robinhood customers can buy one share and up to five options contracts of GameStop.

 "In actuality the data shows that total net shares shorted hasn't moved all that much," Ihor Dusaniwsky of S3 Partners said.

Friday's surge came after Robinhood said it will resume limited trading of previously restricted securities.

Short selling is an investment strategy that is common among hedge funds, yet qualified individual investors can use it, too. Here are the risks.

Freetrade blamed the curbs on a decision by its foreign exchange provider and their bank to restrict trading volume.

When it comes to rolling out coronavirus vaccines, the Irish prime minister told CNBC: "It was always inevitable that there would be bumps along the way."

Users reported that the trading app had halted instant deposits for crypto purchases on Friday.