Riot Platforms Inc (RIOT)

[rarefind]

Lets see what happens....my guess the shorts will feed from here on.Was a great pump and with all great pumps comes massive dumps

— Citron Research (@CitronResearch) December 18, 2017

Citron continued to tweet criticisms of the company on Dec. 19.

$RIOT is THE most traded retail stock in market today yet Citron believes they are making fraudulent claims to investors. We challenge CEO John O'Rourke to a live debate on CNBC Fast Money today. We will be there
— Citron Research (@CitronResearch) December 19, 2017

Citron then invoked the Securities and Exchange Commission in another tweet.

SEC Cyber Unit Task Force should pay special attention to Citron Research interview on CNBC Fast Money regarding $RIOT. Hoping CEO O'Rourke is ready to defend @cnbcfastmoney
— Citron Research (@CitronResearch) December 19, 2017

An external spokesperson for Riot declined to comment on Citron's tweets.

Citron tweeted more generally about digital currencies on Dec. 18, noting a possible arbitrage on the new CME Global Bitcoin Trust futures.