High-Speed Traders Put a Bit Too Much Gravy on Their Meat (By Matt Levine)
One good general rule is that it's harder than you think it is to figure out what's market manipulation and what isn't. Trading a lot, cancelling a lot of orders, putting in orders or doing trades on both sides of the market, trading a lot right before a close or fixing -- all of those things could be signs of nefarious manipulation, Read More -> Sources.
