10 things in tech you need to know today

Zoe Joe Sugg — YouTube Zoe "Zoella" Sugg, with brother Joe Sugg.
David M. Benett / Getty Images

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Robinhood explained why it halted GameStop trading. The company said its deposit requirements related to equities had increased by 10-fold in a week, and it had to block purchases of some stocks to "comfortably" meet security requirements mandated by SEC-registered clearinghouses.
Huawei execs retweeted fake accounts pushing the firm's 5G agenda. One executive for Europe, Kevin Liu, shared 60 posts from fake accounts, the New York Times reported.
The Reddit user behind the GameStop drive is a 34-year-old US man called Keith Gill. Gill, according to the Wall Street Journal, worked in marketing Massachusetts Mutual Life Insurance Co. before his wealth exploded.
Exclusive: YouTuber Zoella was dropped from UK school materials. A letter obtained by Insider from exam board AQA said parents and teachers had expressed concerns about her more adult-themed content.
Xiaomi sued US government officials. The lawsuit is over President Donald Trump's decision to add it to a blacklist that would block American investment.
Facebook's most active US groups are plagued with issues such as hate. According to the Wall Street Journal, Facebook has debated for months on how to rein in groups.
Hyundai execs are wary of Apple. Some execs are wary of becoming a contract manufacturer for the US tech giant, one executive familiar with internal discussions told Reuters.
2021 is set to continue a trend of US tech investment into Europe. US VCs ploughed $28 billion into Europe last year, and continue to see the continent as a source of good-value deals.
Exclusive: Facebook hired its first chief compliance officer. Henry Moniz, who has worked for more than a decade at ViacomCBS and predecessor Viacom, is moving to Facebook next month.
We listed out Google's key European lobbyists. Google is under increasing pressure in Europe, where regulators are clamping down on its platform power.