Quote from TraderZero:
No, but it did completely take away the fact you just used to support your hatred of HFT. Without that fact, a logical person would rethink their position on the subject, but much like a typical conspiracy theorist, you've simply stated that the fact you previously cited doesn't really matter and that your conclusion is still valid. The reality is, when a supporting fact is invalidated, the conclusion needs to be re-evaluated not simply restated.
That, in my mind, removes a lot of credibility I might have attributed to you were we actually having a logical debate on the subject of HFT.
PS - the actual percentage is much, much lower.
The fact is, liquidity is much higher now than it was 10 years ago. You can look at something as simple as the average bid-ask spread in the equity markets to see thats the case. The issue twofold, 1) there's a structural problem presently thats being exploited by the HFT's and it needs to be fixed (easy enough) and 2) lots of traders have simply failed to adapt as the world around them has changed and they are flailing around in an attempt to place blame.
This attempt to blame their newfound lack of profitability or probably more appropriately, reduced profitability, resonates with many retail daytraders as they struggle to explain why they can't make money in the markets. They rationalize that they should be smart enough to be profitable, when in fact they simply aren't. The fact is they don't understand the market, they don't understand its structure, they don't understand the forces that drive it, etc and they aren't, or haven't, taken the steps to learn. Given the world we live in today, rather than look inward in an attempt to figure out why they aren't making money, they look outward and attempt to find some sinister outside force to blame for their own shortcomings. It couldnt' be their own fault, someone or something else has to be to blame.