Virtu Financial’s CEO Vincent Voila is not having a good year. First, his company’s IPO gets cancelled, and now he can’t unload his palatial Upper East Side mansion. In April, high-frequency trading firm Virtu postponed its plans to go public indefinitely amid the firestorm kicked off by Michael Lewis’s book “Flash Boys,” which accused high-frequency trading firms, or HFT firms, of rigging the markets. Six months later, there are no signs of revival. Virtu had planned to raise more than $200 million through its IPO. “They [Virtu] became a poster-child for people that want to attack high-frequency trading,” said Hal ... (full story)