Fixing Wall Street’s Autopilot
By MICHAEL DURBIN
NYT
Chapel Hill, N.C.
ON Thursday afternoon, the Dow plunged 1,000 points within a few minutes, followed by an equally sudden recovery. We don’t know all the details about the drop, but it was almost certainly the result of computer or human error in a high-speed trading program.
Among the many arcane corners of the financial world highlighted by the Wall Street crisis, high-frequency trading — in which computers scan billions of bits of market data for trading opportunities that may exist for mere fractions of a second — has generated a surprising amount of discussion. Alongside the risk of expensive errors like what happened Thursday, critics say, these programs facilitate insider trading and overwhelm regulators’ access to critical information.
These are fair criticisms. Fortunately, they can also be easily addressed without undermining the positive role that high-frequency trading plays in the market.
Let’s start with the insider trading charge. Often, when an exchange operator receives an investor order and finds that another exchange has a better price, it will “flash” the order to a few select traders in its exchange a split second before sending it to market, giving those traders an opportunity to improve their price, too. When used properly, flashing ensures that investors trade at the best available prices.
(More here.)
NYT
Chapel Hill, N.C.
ON Thursday afternoon, the Dow plunged 1,000 points within a few minutes, followed by an equally sudden recovery. We don’t know all the details about the drop, but it was almost certainly the result of computer or human error in a high-speed trading program.
Among the many arcane corners of the financial world highlighted by the Wall Street crisis, high-frequency trading — in which computers scan billions of bits of market data for trading opportunities that may exist for mere fractions of a second — has generated a surprising amount of discussion. Alongside the risk of expensive errors like what happened Thursday, critics say, these programs facilitate insider trading and overwhelm regulators’ access to critical information.
These are fair criticisms. Fortunately, they can also be easily addressed without undermining the positive role that high-frequency trading plays in the market.
Let’s start with the insider trading charge. Often, when an exchange operator receives an investor order and finds that another exchange has a better price, it will “flash” the order to a few select traders in its exchange a split second before sending it to market, giving those traders an opportunity to improve their price, too. When used properly, flashing ensures that investors trade at the best available prices.
(More here.)
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