In testimony prepared for a confirmation hearing, Mary Jo White, nominated to head the Securities and Exchange Commission, highlights a need to better understand high-frequency trading, as well as a need for strict enforcement. "There must be a sense of urgency brought to addressing these issues to understand their impact on investors and the quality of our markets so that the appropriate regulatory responses can be made," White says in reference to HFT. She also says an aggressive enforcement policy "is not only the right thing to do, but it also will serve to deter the sharp and unlawful practices of others."

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