High-frequency trading: useless and manipulative?

I found an interesting  article on the concept for High Frequency trading . The credit for the post is deserved by blogs.reuters.com.

The explosion of interest in high-frequency trading has started to drag new faces to sometimes staid industry conferences. Traders who for years worked on algorithms and computer codes behind the scenes are stepping into the spotlight. They’re appearing on more and more panel discussions, feeling the need to defend their practice against the slings and arrows of politicians and regulators.

So far, they’ve managed to mix exasperation with good humor. The head of one high-frequency trading shop, speaking on a panel this week, said that if you believe everything you read in newspapers you might think the practice is “an unfair, highly profitable and socially useless trading strategy implemented by highly secretive and unregulated traders using superfast computers to compete with retail investors, manipulate markets and front run flash orders causing volatility in the financial markets and creating systemic risk.”

He argued that a more accurate definition of high-frequency trading would be, “a wide variety of highly competitive, low margin trading strategies implemented by professional market intermediaries who have invested heavily in technology that have the effect of making the markets more efficient by enhancing liquidity and transparent price discovery to the benefit of investors.”