you need to take profits. reporter:robinhood and other online brokerages blocked usersfrom buying shares of gamestop and other shortedstocks. - that morning, i woke up tolike minus $10,000 or $15,000. and i was like, yeah, this isthe toughest hit i've ever had. reporter: these sitessuddenly allowed users only to sell their positions,not to get new ones. reporter:robinhood put out a statement, quote, "in lightof recent volatility, we are restrictingtransactions for certain securitiesto position closing only," which meansyou can only sell it. - if you can only sell stocks, then those stocksonly go down. matt kelly: i go to work.and i'm standing there. i'm givinga presentation, right? i'm on a zoom meetingwith 100 people. and the price drops to about120 bucks a share. i'm like in the middleof a word. and i look downand i see that and i just went--i just freeze. i stopped.i'm sick to my stomach.