Sure they did something wrong. Just because an action isn't a violation doesn't make it right. If Sentinel's holdings had been worthless then Velocity would've been out of biz. Ever hear of diversification? And why was the money at Sentinel to begin with? So that Velocity could use customer money to catch a high yield, kick a little back to account holders and skim the rest for themselves. Totally akin to what a bank does with deposits. Except you're insured at the bank.
Quote from Jachyra:
In all fairness, I think its worth noting that technically, Velocity didn't do anything wrong. According to NFA regulations, they are allowed to keep customer segregated funds on deposit with other FCM's, which Sentinel was, and I don't believe they were sanctioned in any way for the events that transpired (note how its referred to as the Sentinel debacle and not the Velocity debacle). Also, they went to court immediately and recovered 100% of customer funds. Other than being inconvenienced for about a week, where wire transfers were temporarily put on hold and customers were unable to withdraw their funds, I don't think any customers were affected and nobody lost any of their money.
If you do an ET search you'll find several threads regarding this issue as it unfolded in realtime.

