Ultimately, markets allow companies to raise finance and investors to allocate capital efficiently. There are clear advantages to high-frequency trading, though the risks it introduces must be tempered to ensure markets can continue to fulfil their primary purposes.
A parallel is the car. A fantastic invention, but sensible rules are necessary to prevent too many people getting hurt.
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Mr Sarao continues to fight extradition to the US. The case continues.
Jim Wood-Smith is head of research at Hawksmoor Investment Management
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