Shares of Green Dot (GDOT -60%) get slammed after missing Q2 earnings estimates across the board late yesterday. Net profit slipped 1.5% on weaker margins. The company also lowered FY12 guidance, citing uncertainty in the prepaid market. It now expects an EPS between $1.29 and $1.32 on revenue in a range of $534M to $543M. Wedbush, Jefferies and Sterne Agee all downgrade the shares on the back of the news.