SARK—what is going on??

Can anyone help me figure out why $Tradr 2X Short Innovation Daily ETF (SARK.US)$ stock appears to have plummeted this morning, despite ARKK not having gone up (in fact having gone down)? I thought maybe stock split or something, but I have the same amount of shares. Very odd. $BMO ARK INNOVATION FD ETF SER UNITS (ARKK.CA)$ $Tesla (TSLA.US)$ $Zoom Video Communications (ZM.US)$ $Nasdaq Composite Index (.IXIC.US)$ $ProShares UltraPro Short QQQ ETF (SQQQ.US)$