Twitter shares sinking in extended hours to the lowest levels since the company's Nov. 7 IPO. It comes after the social networking giant beat on the bottom line, but full-year guidance disappointed investors.
The stock is now off nearly 50-percent from its all-time high of $74.73 on Dec. 26.
"I think the slowness in growth is what everybody is really focused on right now," said OptionMonster's Pete Najarian.
Both "Fast Money" trader Steve Grasso of Stuart Frankel is long Twitter, but he may soon re-evaluate his position.