"I'm buying coz everyone is talking about it..." [6]
We note that, according to Reuters, the IPO is 30x oversubscribed, and bear in mind that banks have advised internally to cancel all limit orders that are over 15% below the NBBO. Which means keep a trailing limit order at 14.99% or less below the NBBO in case of 'market events'.
We are sure, given all these 'extra' rules that greed will take a back seat, that the machines will cross their arms and wait patiently, and that TWTR will open just as CNBC's Bob Pisani hoped - higher with a gentle drift higher all day... </sarc>
(h/t @MWellerFX)

