Twitter (TWTR) reported Q3 earnings after Monday's market close. While it beat revenue estimates, and showed ad revenue growth, cautious Q4 guidance and some vagaries in tallying users are resulting in an aftermarket selloff.

Here's what our analysts are saying:

Tyler Durden: Is This The Reason Twitter Is Tumbling After Hours?

Zacks: Twitter Meets, Stock Tanks On Low Guidance

Jesse's Cafe Americain: SP 500 And NDX Futures Daily Charts - Twitter Spanked After Hours