Rivian tumbled over 12% in morning trading after it warned supply issues to hit 2021 production<blockquote>Rivian警告供应问题将影响 2021 年产量，早盘交易中股价暴跌超过 12%</blockquote>
Rivian tumbled over 12% in morning trading after it warned supply issues to hit 2021 production.It highlighted the challenges it is likely to face in ramping up production to take on EV leader Tesla Inc.Rivian also announced plans to build a $5 billion plant to ramp up capacity, while flagging production challenges even as it receives about 2,000 pre-orders every week."We don't want to read too much into near-term issues ... but it does highlight the risk that Rivian has a lot on its plate," RBC
Roblox slid over 10% in morning trading as it broke the growth momentum for six consecutive months<blockquote>Roblox 早盘交易中下跌超过 10%，连续六个月打破增长势头</blockquote>
Roblox slid over 10% in morning trading as it broke the growth momentum for six consecutive months.I
Hope this torrid performance in Chinese stocks ends soon
E-commerce stocks fell sharply in morning trading, with Pinduoduo and JD.com dropping over 6%,Alibaba dropping 5%<blockquote>电子商务股早盘大幅下跌，拼多多和京东跌幅超过6%，阿里巴巴跌幅5%</blockquote>
E-commerce stocks fell sharply in morning trading, with Pinduoduo and JD.com dropping over 6%,Alibab