SARK—what is going on??

Can anyone help me figure out why $Tuttle Capital Short Innovation ETF(SARK.US)$ 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. $BMO ARK INNOVATION FD ETF SER UNITS(ARKK.CA)$ $Tesla(TSLA.US)$ $Zoom Video Communications(ZM.US)$ $Nasdaq Composite Index(.IXIC.US)$ $ProShares UltraPro Short QQQ ETF(SQQQ.US)$