This is unusual: At 9:30 AM ET today, when the US market opened, Blackstone's stock, $BX, began trading lower. This came even as the S&P 500 hit a new all time high at the open. By 10:35 AM ET, Blackstone's stock was down -4% without any material news. At 12:45 PM ET, President Trump announced a ban on institutional purchases of single-family homes. 5 minutes later, Blackstone's stock was down -9%, erasing -$17 BILLION in market cap on the day. By 2:30 PM ET, the stock had rebounded +5% from its low as dip buyers stepped in. Did someone know this was coming?