UK speed trader arrested over role in 2010 'flash crash'

The sun sets on the address where Nav Sarao Futures Limited is registered, in Hounslow, London April 21, 2015. REUTERS/Neil Hall · Reuters · Reuters

By Douwe Miedema and Sarah N. Lynch

WASHINGTON (Reuters) - A high-frequency trader was arrested in London over his alleged role in the May 2010 "flash crash" that briefly wiped out nearly $1 trillion in market value, the first time authorities have blamed manipulation for the turbulence.

The U.S. Justice Department said on Tuesday that it had criminally charged Navinder Singh Sarao, 36, of London, with wire fraud, commodities fraud and manipulation.

Sarao allegedly used an automated program to generate large sell orders that pushed down prices. He then canceled those trades and bought the contracts at the lower prices to benefit when the market recovered, authorities said.

"His conduct was at least significantly responsible for the order imbalance that in turn was one of the conditions that led to the flash crash," said Aitan Goelman, head of enforcement at the Commodity Futures Trading Commission, which filed parallel civil charges against Sarao on Tuesday.

The case marks the first time U.S. regulators have alleged that market manipulation played a role in the flash crash, in which the Dow Jones Industrial Average plunged more than 1,000 points before recovering somewhat toward the end of trading.

Prosecutors said the Chicago Mercantile Exchange's self-regulatory staffers caught wind of some of Sarao's suspicious trades as early as 2009. He reaped some $40 million between 2010 and 2014 trading the futures contracts known as "E-minis," according to the DOJ complaint.

An October 2010 report by the CFTC and Securities and Exchange Commission found that one of the contributing factors in the flash crash was a computer-driven trade by a mutual fund which chose to sell a large number of E-mini S&P 500 futures contracts. It did not mention market manipulation.

Reuters had earlier identified the trader as Waddell & Reed Financial Inc. Goelman said he would not comment on the role that other institutions played in the crash.

'KISS MY ASS'

The arrest is likely to renew scrutiny of high-frequency and automated trading, widespread practices that have been controversial ever since the flash crash and especially after Michael Lewis's 2014 bestseller "Flash Boys" said that equity markets were rigged.

The case was set in motion by a whistleblower who had provided the CFTC with analysis on the trades, said Shayne Stevenson, a lawyer at Hagens Berman Sobol Shapiro LLP, who represented the whistleblower.

"That CFTC and DOJ teamed up to combat market manipulation ... and to arrest him for this conduct, sends a strong deterrent signal," Stevenson said.