Two years ago, just before Michael Lewis released Flash Boys starting a sharp if brief revulsion against parasitic, predatory High Frequency Trading frontrunners, which delayed Virtu’s IPO by one year, we broke down Virtu’s 2013 net trading income by product line. We were not surprised to find that of the $45 million in total growth, the largest income category, US stocks growth was a tiny 5% of all, rising by $2.3 million in 2013.