The US markets fell again on Wednesday after US inflation data hit a 3-decade high in October with consumer prices surging 6.2% from a year ago. DoorDash surged 11.5% yesterday after announcing intentions to buy Finland-based food delivery company Wolt for 8.1 billion US dollars. Rivian debuted on Wall St overnight with the world?s largest IPO of 2021. Rivian listed with an issue price of 78 US dollars per share, raising 12 billion US dollars. Instagram is testing a ?Take a Break? feature to give users a reminder when they?ve spent too long on the app in a bid to address growing mental health concerns related with such social media apps.