So someone made money on TRON and decided to funnel it into STEEM inconspicuously...
Then they probably tried to run a little promotion to get some bagholders in...
And finally, sold it all on market orders.
Some banks are known (in 'conspiracy' circles) to trade CME for a loss on purpose. Huge market orders at the most illiquid hour possible.
RE: Current Events: Steem Overtakes Hive in Market Cap Once More