An example of privileged, well-connected parties systematically winning asymmetric zero-sum games against the not so well connected. I'll believe that HFT adds

An example of privileged, well-connected parties systematically winning asymmetric zero-sum games against the not so well connected. I'll believe that HFT adds liquidity to the market when the typical retirement horizon is 15 milliseconds. HFT proponents seem not to (or pretend not to) understand diminishing returns where "adding liquidity to the market" is concerned.